-tropincomb. form

Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly.

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek τροπή , -in suffix¹.

Etymology: < ancient Greek τροπή turning (see trope n.) + -in suffix¹, originally and chiefly after adjectives in -tropic comb. form (compare -tropic comb. form 2). Compare -trophin comb. form.Formations are found from the first half of the 20th cent., e.g. gonadotropin n. at gonadotrophic adj. Derivatives, corticotropin n. at corticotrophic adj. Derivatives. Many formations denoting hormones have parallels in -trophin comb. form; see discussion at -trophic comb. form on the underlying semantic motivation and controversy about usage.

Physiology.

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Forming nouns denoting hormones and other substances acting upon a specific tissue, organ, or type of cell, as bacteriotropin n., mammotropin (see mammotrophin n.), gonadotropin n. at gonadotrophic adj. Derivatives, protropin n., etc. Usually corresponding to adjectives in -tropic comb. form.Usually with parallel formations in -trophin comb. form when denoting hormones.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online September 2021).

单词	-tropin
释义	-tropincomb. form Primary stress is attracted to the first syllable of this combining form and vowels may be reduced accordingly. Origin: A borrowing from Greek, combined with an English element. Etymons: Greek τροπή , -in suffix¹. Etymology: < ancient Greek τροπή turning (see trope n.) + -in suffix¹, originally and chiefly after adjectives in -tropic comb. form (compare -tropic comb. form 2). Compare -trophin comb. form.Formations are found from the first half of the 20th cent., e.g. gonadotropin n. at gonadotrophic adj. Derivatives, corticotropin n. at corticotrophic adj. Derivatives. Many formations denoting hormones have parallels in -trophin comb. form; see discussion at -trophic comb. form on the underlying semantic motivation and controversy about usage. Physiology. Categories » Forming nouns denoting hormones and other substances acting upon a specific tissue, organ, or type of cell, as bacteriotropin n., mammotropin (see mammotrophin n.), gonadotropin n. at gonadotrophic adj. Derivatives, protropin n., etc. Usually corresponding to adjectives in -tropic comb. form.Usually with parallel formations in -trophin comb. form when denoting hormones. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online September 2021). < comb. form
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