"zepto-" meaning in English

{
  "antonyms": [
    {
      "word": "zetta-"
    }
  ],
  "etymology_text": "Greek (h)epta- (seven), for the seventh order of 10⁻³. The final o conforms to the finals vowel of the SI series from micro- downwards; the letter z was added, as a start in a series of terms running backwards through the alphabet.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "zepto-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "zepto-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [],
      "derived": [
        {
          "word": "zeptoampere"
        },
        {
          "word": "zeptobecquerel"
        },
        {
          "word": "zeptobel"
        },
        {
          "word": "zeptocandela"
        },
        {
          "word": "zeptoelectronvolt"
        },
        {
          "word": "zeptofarad"
        },
        {
          "word": "zeptogram"
        },
        {
          "word": "zeptogray"
        },
        {
          "word": "zeptohenry"
        },
        {
          "word": "zeptojoule"
        },
        {
          "word": "zeptokelvin"
        },
        {
          "word": "zeptolux"
        },
        {
          "alt": "zeptometre",
          "word": "zeptometer"
        },
        {
          "word": "zeptomole"
        },
        {
          "word": "zeptosecond"
        },
        {
          "word": "zeptovolt"
        },
        {
          "word": "zeptovoltampere"
        },
        {
          "word": "zeptowatt"
        }
      ],
      "glosses": [
        "In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²¹ (short scale sextillionth or long scale trilliardth). Symbol: z"
      ],
      "id": "en-zepto--en-prefix-9fF9CQOa",
      "links": [
        [
          "International System of Units",
          "International System of Units"
        ],
        [
          "metric",
          "metric"
        ],
        [
          "unit",
          "unit"
        ],
        [
          "short scale",
          "short scale"
        ],
        [
          "sextillionth",
          "sextillionth"
        ],
        [
          "long scale",
          "long scale"
        ],
        [
          "trilliardth",
          "trilliardth"
        ]
      ],
      "tags": [
        "morpheme"
      ],
      "translations": [
        {
          "code": "bg",
          "lang": "Bulgarian",
          "roman": "zepto-",
          "sense": "10−21",
          "word": "зепто-"
        },
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "roman": "zèpǔtuō",
          "sense": "10−21",
          "word": "仄普托"
        },
        {
          "code": "nl",
          "lang": "Dutch",
          "sense": "10−21",
          "word": "zepto-"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "10−21",
          "word": "zepto-"
        },
        {
          "code": "gl",
          "lang": "Galician",
          "sense": "10−21",
          "word": "zepto-"
        },
        {
          "code": "is",
          "lang": "Icelandic",
          "sense": "10−21",
          "word": "septó-"
        },
        {
          "code": "id",
          "lang": "Indonesian",
          "sense": "10−21",
          "word": "zepto-"
        },
        {
          "code": "ja",
          "lang": "Japanese",
          "roman": "zeputo-",
          "sense": "10−21",
          "word": "ゼプト-"
        },
        {
          "code": "ms",
          "lang": "Malay",
          "sense": "10−21",
          "word": "zepto-"
        },
        {
          "code": "fa",
          "lang": "Persian",
          "sense": "10−21",
          "word": "زپتو"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "zepto-",
          "sense": "10−21",
          "word": "зепто-"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "10−21",
          "word": "zepto-"
        },
        {
          "code": "uk",
          "lang": "Ukrainian",
          "roman": "zepto-",
          "sense": "10−21",
          "word": "зепто-"
        }
      ]
    }
  ],
  "word": "zepto-"
}

{
  "antonyms": [
    {
      "word": "zetta-"
    }
  ],
  "derived": [
    {
      "word": "zeptoampere"
    },
    {
      "word": "zeptobecquerel"
    },
    {
      "word": "zeptobel"
    },
    {
      "word": "zeptocandela"
    },
    {
      "word": "zeptoelectronvolt"
    },
    {
      "word": "zeptofarad"
    },
    {
      "word": "zeptogram"
    },
    {
      "word": "zeptogray"
    },
    {
      "word": "zeptohenry"
    },
    {
      "word": "zeptojoule"
    },
    {
      "word": "zeptokelvin"
    },
    {
      "word": "zeptolux"
    },
    {
      "alt": "zeptometre",
      "word": "zeptometer"
    },
    {
      "word": "zeptomole"
    },
    {
      "word": "zeptosecond"
    },
    {
      "word": "zeptovolt"
    },
    {
      "word": "zeptovoltampere"
    },
    {
      "word": "zeptowatt"
    }
  ],
  "etymology_text": "Greek (h)epta- (seven), for the seventh order of 10⁻³. The final o conforms to the finals vowel of the SI series from micro- downwards; the letter z was added, as a start in a series of terms running backwards through the alphabet.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prefix",
        "head": "",
        "sort": ""
      },
      "expansion": "zepto-",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "zepto-",
      "name": "en-prefix"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        "English lemmas",
        "English prefixes",
        "en:Metric prefixes"
      ],
      "glosses": [
        "In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 10⁻²¹ (short scale sextillionth or long scale trilliardth). Symbol: z"
      ],
      "links": [
        [
          "International System of Units",
          "International System of Units"
        ],
        [
          "metric",
          "metric"
        ],
        [
          "unit",
          "unit"
        ],
        [
          "short scale",
          "short scale"
        ],
        [
          "sextillionth",
          "sextillionth"
        ],
        [
          "long scale",
          "long scale"
        ],
        [
          "trilliardth",
          "trilliardth"
        ]
      ],
      "tags": [
        "morpheme"
      ]
    }
  ],
  "translations": [
    {
      "code": "bg",
      "lang": "Bulgarian",
      "roman": "zepto-",
      "sense": "10−21",
      "word": "зепто-"
    },
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "roman": "zèpǔtuō",
      "sense": "10−21",
      "word": "仄普托"
    },
    {
      "code": "nl",
      "lang": "Dutch",
      "sense": "10−21",
      "word": "zepto-"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "10−21",
      "word": "zepto-"
    },
    {
      "code": "gl",
      "lang": "Galician",
      "sense": "10−21",
      "word": "zepto-"
    },
    {
      "code": "is",
      "lang": "Icelandic",
      "sense": "10−21",
      "word": "septó-"
    },
    {
      "code": "id",
      "lang": "Indonesian",
      "sense": "10−21",
      "word": "zepto-"
    },
    {
      "code": "ja",
      "lang": "Japanese",
      "roman": "zeputo-",
      "sense": "10−21",
      "word": "ゼプト-"
    },
    {
      "code": "ms",
      "lang": "Malay",
      "sense": "10−21",
      "word": "zepto-"
    },
    {
      "code": "fa",
      "lang": "Persian",
      "sense": "10−21",
      "word": "زپتو"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "zepto-",
      "sense": "10−21",
      "word": "зепто-"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "10−21",
      "word": "zepto-"
    },
    {
      "code": "uk",
      "lang": "Ukrainian",
      "roman": "zepto-",
      "sense": "10−21",
      "word": "зепто-"
    }
  ],
  "word": "zepto-"
}