Adjective
1. Resembling a comb (wiktionary.org); having narrow parallel projections or divisions suggestive of the teeth of a comb. (merriam-webster.com)
2. Having segments which are greatly lengthened to one side. (wiktionary.org)
3. The beetle’s antennae had a pectinate shape. (wiktionary.org)
4. (Mycology) Striate. (wiktionary.org)