Definitions

1. adjective

relating to or resembling a comb-toothed margin or a comb-like structure, especially in the shape of the brachial or branchial teeth of a shark, or in the shape of the dental plates of certain mollusks

“The ctenoidian pattern on the shark’s teeth was a fascinating example of evolutionary adaptation.”

2. noun

a tooth or tooth-like structure, especially one of a series of teeth or plates in certain animals

“The shark’s ctenoidians were razor-sharp and perfect for catching prey.”