Pectinated is an uncommon word that is used to describe something that has a comb-like appearance or structure. The word is often used in biology and botany to describe certain structures and features of organisms, such as the veins on leaves or the arrangement of teeth on a shark's jaw. Synonyms for pectinated include comb-like, toothed, serrated, notched, saw-toothed, and ridged. These words are often used interchangeably, depending on the context and the specific features being described. While pectinated may not be a widely recognized word, its synonyms are familiar and useful in conveying the same meaning.