"substoichiometric" meaning in English

{
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    {
      "args": {
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        "2": "sub",
        "3": "stoichiometric"
      },
      "expansion": "sub- + stoichiometric",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sub- + stoichiometric.",
  "forms": [
    {
      "form": "more substoichiometric",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most substoichiometric",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "substoichiometric (comparative more substoichiometric, superlative most substoichiometric)",
      "name": "en-adj"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "name": "English terms prefixed with sub-",
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          "orig": "en:Chemistry",
          "parents": [
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            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "Involving less than the stoichiometric amount of a reagent"
      ],
      "id": "en-substoichiometric-en-adj-2Kr4Wteu",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "stoichiometric",
          "stoichiometric"
        ]
      ],
      "raw_glosses": [
        "(chemistry) Involving less than the stoichiometric amount of a reagent"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "substoichiometric"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "stoichiometric"
      },
      "expansion": "sub- + stoichiometric",
      "name": "prefix"
    }
  ],
  "etymology_text": "From sub- + stoichiometric.",
  "forms": [
    {
      "form": "more substoichiometric",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most substoichiometric",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "substoichiometric (comparative more substoichiometric, superlative most substoichiometric)",
      "name": "en-adj"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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      "glosses": [
        "Involving less than the stoichiometric amount of a reagent"
      ],
      "links": [
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          "chemistry",
          "chemistry"
        ],
        [
          "stoichiometric",
          "stoichiometric"
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        "(chemistry) Involving less than the stoichiometric amount of a reagent"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "substoichiometric"
}