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cren·u·late(krĕn′yə-lĭt, -lāt′) or cren·u·lat·ed (-lā′tĭd)
Having a margin or contour with shallow, usually rounded notches and projections; finely notched or scalloped: a crenulate leaf; a crenulate coastline.
[New Latin crēnulātus, from crēnula, diminutive of Medieval Latin crēna, notch.]
crenulate(ˈkrɛnjʊˌleɪt; -lɪt) or
(Biology) having a margin very finely notched with rounded projections, as certain leaves
[C18: from New Latin crēnulātus, from crēnula, literally: a little notch; see crenel]
cren•u•late(ˈkrɛn yəˌleɪt, -lɪt)
minutely crenate, as the margin of certain leaves.