(especially of a leaf, shell, or shoreline) having a finely scalloped or notched outline or edge.‘Growth lines are very finely crenulate in a narrow zone approximately two-thirds the distance from the umbilicus to the periphery, and the shell here has a very weak shoulder.’Compare with crenate
jagged, craggy, rugged, uneven, rough, irregular, broken
- ‘The maximum width of this specimen occurs at the mid-length, and the anterolateral margin is crenulate.’
Late 18th century from modern Latin crenulatus, from crenula, diminutive of crena ‘notch’.
Are You Learning English? Here Are Our Top English Tips