cre·nate \ˈkrēˌnāt, -reˌ-, -_nə̇t\adjective Etymology: New Latin crenatus, from Medieval Latin, past participle of crenare to split — more at crenel : having the margin cut into rounded scallops — used especially in botany of foliar structures < a bicrenate leaf > and in physiology of shrunken red blood corpuscles — see crenation • cre·nate·lyadverb