Noun | 1. | Pectinidae - scallops mollusk family - a family of mollusks Bivalvia, class Bivalvia, class Lamellibranchia, class Pelecypoda, Lamellibranchia - oysters; clams; scallops; mussels escallop, scollop, scallop - edible marine bivalve having a fluted fan-shaped shell that swim by expelling water from the shell in a series of snapping motions genus Pecten - type genus of the family Pectinidae: sea and bay scallops |