Entry 2 senses · 2 variants Webster, 1913 Pectinal · Pec·ti·nal · IPA a. n. 01 a. Of or pertaining to a comb; resembling a comb. 1. Of or pertaining to a comb; resembling a comb. 02 n. A fish whose bones resemble comb teeth. 1. A fish whose bones resemble comb teeth.