pylorus (n.)youdaoicibaDictYouDict[pylorus 词源字典]
1610s, from Late Latin pylorus "the lower orifice of the stomach," from Greek pyloros, literally "gatekeeper, porter," from pyle "gate" (see pylon) + ouros "watcher, guardian" (see warrant (n.)). Related: Pyloric.[pylorus etymology, pylorus origin, 英语词源]