helix (n.)youdaoicibaDictYouDict[helix 词源字典]
"a spiral thing," 1560s, from Latin helix "spiral," from Greek helix (genitive helikos), related to eilein "to turn, twist, roll," from PIE *wel-ik-, from root *wel- (3) "to turn, revolve" (see volvox).[helix etymology, helix origin, 英语词源]