crenulated --Merriam-Webster
adjective
cren·u·lat·ed ˈkren-yə-ˌlā-təd
variants or crenulate
ˈkren-yə-lət
-ˌlāt
: having an irregularly wavy or serrate outline
a crenulated shoreline
crenulation
ˌkren-yə-ˈlā-shən
noun
Etymology
crenulate "serrate" (borrowed from New Latin crenulātus, from presumed *crenula, diminutive of *crena "notch," back-formed from crenātus crenate) + -ed entry 1
First Known Use
1777, in the meaning defined above