crenulated
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 
Example Sentences
Recent Examples on the Web An ancient castle, its crenulated tower looking out onto woods shrouded in mist. 
Soren Andersen, The Seattle Times, 27 Apr. 2017
Soren Andersen, The Seattle Times, 27 Apr. 2017 Word History
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