Formal:
* Comb-like: This is the most direct and accurate description.
* Crenulated: This word emphasizes the small, evenly spaced teeth.
* Dentate: This word is more general and can refer to any toothed edge.
* Serrate: This word specifically refers to teeth that are saw-like and pointed.
Informal:
* Comb-toothed: This is a simple and descriptive phrase.
* Toothy: This word is more general but suggests a lot of teeth.
* Jagged: This word suggests irregular teeth, but can still be used to describe a comb-like edge.
The best word will depend on the specific object you are describing and the desired level of formality.