"tropin" meaning in English

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        "2": "tropic",
        "3": "in"
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      "expansion": "tropic + -in",
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  ],
  "etymology_text": "tropic + -in",
  "forms": [
    {
      "form": "tropins",
      "tags": [
        "plural"
      ]
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      "expansion": "tropin (plural tropins)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Biology",
          "orig": "en:Biology",
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            "Sciences",
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          "kind": "other",
          "name": "English terms suffixed with -in",
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      ],
      "glosses": [
        "any of the tropic hormones; one that is secreted by an endocrine gland and targets another such gland"
      ],
      "id": "en-tropin-en-noun-rNoPQ6NI",
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "tropic hormone",
          "tropic hormone"
        ],
        [
          "endocrine gland",
          "endocrine gland"
        ],
        [
          "target",
          "target"
        ]
      ],
      "raw_glosses": [
        "(biology) any of the tropic hormones; one that is secreted by an endocrine gland and targets another such gland"
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    },
    {
      "alt_of": [
        {
          "word": "tropine"
        }
      ],
      "glosses": [
        "Alternative spelling of tropine"
      ],
      "id": "en-tropin-en-noun-x2eGRbqU",
      "links": [
        [
          "tropine",
          "tropine#English"
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  ],
  "sounds": [
    {
      "rhymes": "-əʊpɪn"
    }
  ],
  "word": "tropin"
}

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    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English terms suffixed with -in",
    "Rhymes:English/əʊpɪn",
    "Rhymes:English/əʊpɪn/2 syllables"
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  ],
  "etymology_text": "tropic + -in",
  "forms": [
    {
      "form": "tropins",
      "tags": [
        "plural"
      ]
    }
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      "expansion": "tropin (plural tropins)",
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  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "categories": [
        "en:Biology"
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      "glosses": [
        "any of the tropic hormones; one that is secreted by an endocrine gland and targets another such gland"
      ],
      "links": [
        [
          "biology",
          "biology"
        ],
        [
          "tropic hormone",
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        ],
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          "endocrine gland",
          "endocrine gland"
        ],
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          "target",
          "target"
        ]
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      "raw_glosses": [
        "(biology) any of the tropic hormones; one that is secreted by an endocrine gland and targets another such gland"
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    },
    {
      "alt_of": [
        {
          "word": "tropine"
        }
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      "glosses": [
        "Alternative spelling of tropine"
      ],
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          "tropine",
          "tropine#English"
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  "sounds": [
    {
      "rhymes": "-əʊpɪn"
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  ],
  "word": "tropin"
}