ˌpektəˈnāshēə noun plural
Usage: capitalized
Etymology: New Latin, from Pectin-, Pecten, type genus + -acea
: a suborder of Filibranchia comprising active bivalve mollusks that have a fan-shaped shell and no siphons including the typical pectens and related forms
• pec·ti·na·cean ˌpektəˈnäsh(ē)ən noun -s