cten·oid \ˈteˌnȯid, ˈtēˌ-\adjective Etymology: International Scientific Vocabulary, from Greek ktenoeidēs comblike, from kten-, kteis comb + -oeidēs -oid — more at pectinate 1.: having the margin toothed like a comb < ctenoid scales are characteristic of spiny-rayed fishes > 2.: consisting of scales with ctenoid margins < ctenoid scalation > often: having such scales < ctenoid fishes >