The Collaborative International Dictionary
Pectinibranchiate
Pectinibranchiate \Pec`ti*ni*bran"chi*ate\, a. [L. pecten, -inis, a comb + E. branchiate.] (Zo["o]l.) Having pectinated gills.
Wiktionary
pectinibranchiate
a. (context zoology English) Having pectinated gills.