pectinate
Resembling a comb. — Having narrow ridges or projections aligned close together like the teeth of a comb.
The moth's antennae were pectinate in shape, set with long teeth along one edge only.
Resembling a comb. — Striate.
Where it comes from
Borrowed from Latin pectinātus (“combed”), from pectinō (“to comb”), from pecten (“comb”). First attested in the mid-18th century. By surface analysis, Latin pectin- (“comb, scallop”) + -ate.
Adapted from the Wiktionary entry pectinate (CC BY-SA 4.0).