crease (n.)youdaoicibaDictYouDict[crease 词源字典]
1660s, altered from creaste "a ridge," perhaps a variant of crest (n.), via meaning "a fold in a length of cloth" (mid-15c.) which produced a crest. In sports, first in cricket (1779), where it was originally cut into the ground. As a verb, from 1580s. Related: Creased; creasing.[crease etymology, crease origin, 英语词源]
formulae (n.)youdaoicibaDictYouDict
plural of formula.
Men who try to speak what they believe, are naked men fighting men quilted sevenfold in formulae. [Charles Kingsley, "Letters," 1861]
gather (n.)youdaoicibaDictYouDict
"plait or fold in cloth," 1660s, from gather (v.).
sine (n.)youdaoicibaDictYouDict
trigonometric function, 1590s (in Thomas Fale's "Horologiographia, the Art of Dialling"), from Latin sinus "fold in a garment, bend, curve, bosom" (see sinus). Used mid-12c. by Gherardo of Cremona in Medieval Latin translation of Arabic geometrical text to render Arabic jiba "chord of an arc, sine" (from Sanskrit jya "bowstring"), which he confused with jaib "bundle, bosom, fold in a garment."
sinus (n.)youdaoicibaDictYouDict
"hollow curve or cavity in the body," early 15c., from Medieval Latin sinus, from Latin sinus "bend, fold, curve, a bent surface; a bay, bight, gulf; a fold in land;" also "fold of the toga about the breast," hence "bosom," and figuratively "love, affection, intimacy; interior, inmost part;" of unknown origin.
tuck (n.)youdaoicibaDictYouDict
late 14c., "flattened fold in clothing, pleat," from tuck (v.). As a folded-up diving position, from 1951.