Definition of polychaete
: any of a class (Polychaeta) of chiefly marine annelid worms (as clam worms) usually with paired segmental appendages, separate sexes, and a free-swimming trochophore larva
Origin of polychaete
ultimately from Greek polychaitēs having much hair, from poly- + chaitē long hair
First Known Use: 1896
Learn More about polychaete
Britannica.com: Encyclopedia article about "polychaete"
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