turnstile (n.)youdaoicibaDictYouDict[turnstile 词源字典]
1640s, from turn (v.) + stile (n.).[turnstile etymology, turnstile origin, 英语词源]
turnsoleyoudaoicibaDictYouDict
"A Mediterranean plant of the spurge family, whose flowers are said to turn with the sun", Late Middle English: from Old French tournesole, based on Latin tornare (see turn) + sol 'sun'.