"sleep personified; the god of sleep in Roman mythology," equivalent of Greek Hypnos, son of Night and brother of Death, 1590s, from Latin somnus "sleep, drowsiness," from PIE *swep-no-, from root *swep- (1) "to sleep" (cognates: Sanskrit svapnah, Avestan kvafna-, Greek hypnos, Lithuanian sapnas, Old Church Slavonic sunu, Old Irish suan, Welsh hun "sleep," Latin sopor "a deep sleep," Old English swefn, Old Norse svefn "a dream").
实用例句
1. Enrofloxacin has demonstrated in vivo and in vitro activity against Mannheimia Pasteurella multocida, and Haemophilus somnus.
