-tropycomb. form

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

Origin: Of multiple origins. Partly a borrowing from Latin. Partly a borrowing from Greek. Etymons: Latin -tropia; Greek -τροπία.

Etymology: < (i) post-classical Latin and scientific Latin -tropia (formations in which are found from at least the early 17th cent.), and its etymon (ii) ancient Greek -τροπία, combining form (in e.g. ἐντροπία : see entropy n.) < -τροπος (see -trope comb. form) + -ία -y suffix³. Compare French -tropie (formations in which are found from the first half of the 19th cent.), German -tropie (formations in which are found from the first half of the 19th cent., e.g. Allotropie allotropy n.). Compare -tropism comb. form.Formations are found from the mid 19th cent., in early use frequently as adaptations of words from foreign languages (compare e.g. allotropy n., anatropy n.). Combining with first elements ultimately of Greek origin.

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1. Chiefly Botany. Forming nouns denoting types of spatial orientation or directional movement or growth in response to a stimulus, as geotropy n., heliotropy n., plagiotropy n. Usually corresponding to adjectives in -tropic comb. form.Frequently with parallel formations in -tropism comb. form.

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2. Chemistry. Forming nouns relating to physical change or variation in materials, as allotropy n., enantiotropy n., monotropy n., etc. Usually corresponding to adjectives in -tropic comb. form and nouns in -trope comb. form.Frequently with parallel formations in -tropism comb. form.

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

单词	-tropy
释义	-tropycomb. form Primary stress is attracted to the syllable immediately preceding this combining form and vowels may be reduced accordingly. Origin: Of multiple origins. Partly a borrowing from Latin. Partly a borrowing from Greek. Etymons: Latin -tropia; Greek -τροπία. Etymology: < (i) post-classical Latin and scientific Latin -tropia (formations in which are found from at least the early 17th cent.), and its etymon (ii) ancient Greek -τροπία, combining form (in e.g. ἐντροπία : see entropy n.) < -τροπος (see -trope comb. form) + -ία -y suffix³. Compare French -tropie (formations in which are found from the first half of the 19th cent.), German -tropie (formations in which are found from the first half of the 19th cent., e.g. Allotropie allotropy n.). Compare -tropism comb. form.Formations are found from the mid 19th cent., in early use frequently as adaptations of words from foreign languages (compare e.g. allotropy n., anatropy n.). Combining with first elements ultimately of Greek origin. Categories » 1. Chiefly Botany. Forming nouns denoting types of spatial orientation or directional movement or growth in response to a stimulus, as geotropy n., heliotropy n., plagiotropy n. Usually corresponding to adjectives in -tropic comb. form.Frequently with parallel formations in -tropism comb. form. Categories » 2. Chemistry. Forming nouns relating to physical change or variation in materials, as allotropy n., enantiotropy n., monotropy n., etc. Usually corresponding to adjectives in -tropic comb. form and nouns in -trope comb. form.Frequently with parallel formations in -tropism comb. form. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online September 2021). < comb. form
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