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The Collaborative International Dictionary of English v.0.48 (gcide)

Dentate \Den"tate\ (d[e^]n"t[asl]t), Dentated \Den"ta*ted\
(d[e^]n"t[asl]*t[e^]d), a. [L. dentatus, fr. dens, dentis,
tooth.]
1. (Bot.) Toothed; especially, with the teeth projecting
straight out, not pointed either forward or backward; as,
a dentate leaf.
[1913 Webster]

2. (Zool.) Having teeth or toothlike points. See Illust. of
{Antenn[ae]}.
[1913 Webster]