"underfilter" meaning in All languages combined

{
  "coordinate_terms": [
    {
      "_dis1": "0 0",
      "word": "overfilter"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "filter"
      },
      "expansion": "under- + filter",
      "name": "prefix"
    }
  ],
  "etymology_text": "under- + filter",
  "forms": [
    {
      "form": "underfilters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underfilter (plural underfilters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Signal processing",
          "orig": "en:Signal processing",
          "parents": [
            "Applied mathematics",
            "Telecommunications",
            "Mathematics",
            "Communication",
            "Technology",
            "Formal sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "41 8 50",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1999, Edward R. Dougherty, Jaakko Astola, Nonlinear Filters for Image Processing, page 180",
          "text": "It is clear that overfilters and underfilters are dual in the sense of the duality principle.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A morphological filter (idempotent operator) whose image is a subset of the domain."
      ],
      "id": "en-underfilter-en-noun-NyQsaCWx",
      "links": [
        [
          "morphological",
          "morphological"
        ],
        [
          "filter",
          "filter"
        ],
        [
          "idempotent",
          "idempotent"
        ],
        [
          "operator",
          "operator"
        ],
        [
          "image",
          "image"
        ],
        [
          "subset",
          "subset"
        ],
        [
          "domain",
          "domain"
        ]
      ],
      "raw_glosses": [
        "(signal processing) A morphological filter (idempotent operator) whose image is a subset of the domain."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences",
        "signal-processing"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "ref": "1967, Journal of the Institution of Engineers Pakistan",
          "text": "The paving downstream consisted of 18x18x8-inch blocks laid on edge over a brick base which in turn was underlain with a gravel or brick chip filter. Since there was some controversy as to whether an underfilter was necessary, the first test was made with the filter omited.",
          "type": "quotation"
        },
        {
          "ref": "1988, Árpád Kézdi, László Rétháti, Handbook of Soil Mechanics, page 61",
          "text": "Since there is no underfilter, the top flow line emerges on the downstream slope.",
          "type": "quotation"
        },
        {
          "ref": "1992, Margaret M. Manson, Immunochemical Protocols, page 445",
          "text": "A single sheet of filter paper is used as an underfilter.",
          "type": "quotation"
        },
        {
          "ref": "2004, R.F. Craig, Craig's Soil Mechanics, page 430",
          "text": "In addition, the flow from the underfilter, which had previously been clear, became cloudy, indicating that the filter had failed to block particles from the core.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A filter that is positioned beneath something."
      ],
      "id": "en-underfilter-en-noun-hzK4BCOw",
      "links": [
        [
          "filter",
          "filter"
        ]
      ]
    }
  ],
  "word": "underfilter"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "filter"
      },
      "expansion": "under- + filter",
      "name": "prefix"
    }
  ],
  "etymology_text": "under- + filter",
  "forms": [
    {
      "form": "underfilters",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "underfiltering",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "underfiltered",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "underfiltered",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underfilter (third-person singular simple present underfilters, present participle underfiltering, simple past and past participle underfiltered)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "41 8 50",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "29 31 39",
          "kind": "other",
          "name": "English terms prefixed with under-",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1966, William P. Braker, Know how to Keep Saltwater Fishes, page 19",
          "text": "It is not possible to overfilter your tank but marine aquaria are frequently underfiltered.",
          "type": "quotation"
        },
        {
          "ref": "1978, Hydraulics and Pneumatics",
          "text": "You don't want to underfilter. Nor do you want to filter beyond what is economically justifiable.",
          "type": "quotation"
        },
        {
          "ref": "1994, Douglas Van Nostrand, Selected Atlases of Cardiovascular Nuclear Medicine, page 35",
          "text": "Underfiltering by using too high a cut-off frequency leaves too much noise in the reconstructed images (bottom row).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To filter insufficiently."
      ],
      "id": "en-underfilter-en-verb-OA0Xyuc~",
      "links": [
        [
          "filter",
          "filter"
        ],
        [
          "insufficient",
          "insufficient"
        ]
      ]
    }
  ],
  "word": "underfilter"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English terms prefixed with under-",
    "English verbs"
  ],
  "coordinate_terms": [
    {
      "word": "overfilter"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "filter"
      },
      "expansion": "under- + filter",
      "name": "prefix"
    }
  ],
  "etymology_text": "under- + filter",
  "forms": [
    {
      "form": "underfilters",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underfilter (plural underfilters)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with quotations",
        "Quotation templates to be cleaned",
        "en:Signal processing"
      ],
      "examples": [
        {
          "ref": "1999, Edward R. Dougherty, Jaakko Astola, Nonlinear Filters for Image Processing, page 180",
          "text": "It is clear that overfilters and underfilters are dual in the sense of the duality principle.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A morphological filter (idempotent operator) whose image is a subset of the domain."
      ],
      "links": [
        [
          "morphological",
          "morphological"
        ],
        [
          "filter",
          "filter"
        ],
        [
          "idempotent",
          "idempotent"
        ],
        [
          "operator",
          "operator"
        ],
        [
          "image",
          "image"
        ],
        [
          "subset",
          "subset"
        ],
        [
          "domain",
          "domain"
        ]
      ],
      "raw_glosses": [
        "(signal processing) A morphological filter (idempotent operator) whose image is a subset of the domain."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences",
        "signal-processing"
      ]
    },
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1967, Journal of the Institution of Engineers Pakistan",
          "text": "The paving downstream consisted of 18x18x8-inch blocks laid on edge over a brick base which in turn was underlain with a gravel or brick chip filter. Since there was some controversy as to whether an underfilter was necessary, the first test was made with the filter omited.",
          "type": "quotation"
        },
        {
          "ref": "1988, Árpád Kézdi, László Rétháti, Handbook of Soil Mechanics, page 61",
          "text": "Since there is no underfilter, the top flow line emerges on the downstream slope.",
          "type": "quotation"
        },
        {
          "ref": "1992, Margaret M. Manson, Immunochemical Protocols, page 445",
          "text": "A single sheet of filter paper is used as an underfilter.",
          "type": "quotation"
        },
        {
          "ref": "2004, R.F. Craig, Craig's Soil Mechanics, page 430",
          "text": "In addition, the flow from the underfilter, which had previously been clear, became cloudy, indicating that the filter had failed to block particles from the core.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A filter that is positioned beneath something."
      ],
      "links": [
        [
          "filter",
          "filter"
        ]
      ]
    }
  ],
  "word": "underfilter"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English terms prefixed with under-",
    "English verbs"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "under",
        "3": "filter"
      },
      "expansion": "under- + filter",
      "name": "prefix"
    }
  ],
  "etymology_text": "under- + filter",
  "forms": [
    {
      "form": "underfilters",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "underfiltering",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "underfiltered",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "underfiltered",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "underfilter (third-person singular simple present underfilters, present participle underfiltering, simple past and past participle underfiltered)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "1966, William P. Braker, Know how to Keep Saltwater Fishes, page 19",
          "text": "It is not possible to overfilter your tank but marine aquaria are frequently underfiltered.",
          "type": "quotation"
        },
        {
          "ref": "1978, Hydraulics and Pneumatics",
          "text": "You don't want to underfilter. Nor do you want to filter beyond what is economically justifiable.",
          "type": "quotation"
        },
        {
          "ref": "1994, Douglas Van Nostrand, Selected Atlases of Cardiovascular Nuclear Medicine, page 35",
          "text": "Underfiltering by using too high a cut-off frequency leaves too much noise in the reconstructed images (bottom row).",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To filter insufficiently."
      ],
      "links": [
        [
          "filter",
          "filter"
        ],
        [
          "insufficient",
          "insufficient"
        ]
      ]
    }
  ],
  "word": "underfilter"
}