pectiniform
/pɛkˈtɪnɪfɔːm/(also pecteniform) Chiefly Science
adjective
1Resembling or having the form of a scallop; pectinoid.
2Shaped like a comb; pectinate.
Origin
Early 19th century; earliest use found in James Parkinson (1755–1824), surgeon and palaeontologist. From pectini- + -form, probably after scientific Latin pectiniformis.