The Collaborative International Dictionary of English v.0.48:
Crenulate \Cren"u*late\ (kr?n"?-l?t), Crenulated \Cren"u*la`ted\ (-l?`t?d), a. [Dim. of crenate.] (Bot.) Minutely crenate. [1913 Webster]WordNet (r) 3.0 (2006):
crenulated adj 1: having a margin with small rounded teeth; "a crenulate leaf" [syn: crenulate, crenulated]