ˌ ̷ ̷(ˌ) ̷ ̷+ noun plural
Usage: capitalized
Etymology: New Latin, from prot- + -branchia
: an order of Lamellibranchia comprising primitive bivalve mollusks in which the gills consist of a double row of simple lamellae not reflected or united
• pro·to·branchiate | ̷ ̷(ˌ) ̷ ̷+ adjective