出典:Wiktionary
出典:『Wiktionary』 (2026/04/13 19:39 UTC 版)
The noun is borrowed from French héliotrope, from Latin hēliotropium (“plant which turns to face the sun; bloodstone”), from Ancient Greek ἡλῐοτρόπῐον (hēlĭotrópĭon, “European heliotrope (Heliotropium europaeum); bloodstone; solar clock, sundial”), from ἥλῐος (hḗlĭos, “the sun”) (ultimately from Proto-Indo-European *sóh₂wl̥ (“the sun”)) + τρόπος (trópos, “a turn”) (from τρέπω (trépō, “to rotate; to turn”) (from Proto-Indo-European *trep- (“to turn”)) + -ος (-os, suffix forming nouns from verbs)) + -ῐον (-ĭon, diminutive suffix forming nouns). By surface analysis, helio- + -trope.
The French-derived spelling displaced 中期英語 elitrope, eliotropius, elitropium (“plant which turns to face the sun; bloodstone”) [and other forms], from 古期英語 eliotropus, from Latin hēliotropium (see above); and 古期英語 siġelhweorfa, sōlsece, and sunnfolgend (“heliotrope flower”).
Noun sense 6 (“synonym of bloodstone”) is from the fact that a piece of the mineral placed in water is said to change the sun’s rays to a blood-red colour: see the 1601 quotation.
The adjective is probably derived from the noun.
heliotrope (countable and uncountable, plural heliotropes)
heliotrope (comparative more heliotrope, superlative most heliotrope)
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heliozoans
coypus
limnobios
apheliotropic plant
periwinkles
taeniafuge
procathedral
a buoy
a cerement
the negative pole
the negative pole―the cathode
a triumph