pectinate
adjective
pec·ti·nate ˈpek-tə-ˌnāt 
: having narrow parallel projections or divisions suggestive of the teeth of a comb
pectinate antennae
pectination
ˌpek-tə-ˈnā-shən
noun 
Word History
Etymology
Latin pectinatus, from pectin-, pecten comb; akin to Greek kten-, kteis comb
First Known Use
1757, in the meaning defined above
Medical Definition
pectinate 1 of 2
adjective
pec·ti·nate ˈpek-tə-ˌnāt
: having narrow parallel projections or divisions suggestive of the teeth of a comb
pectinate
2 of 2noun
: a salt or ester of a pectinic acid