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Webster's 1913 Dictionary

OSTRACOID

OSTRACOID Os "tra *coid, a. (Zoöl.)

 

Defn: Of or pertaining to the Ostracoidea. -- n.

 

Defn: One of the Ostracoidea.

 

OSTRACOIDEA

Os `tra *coi "de *a, n. pl. Etym: [NL. , fr. Gr. -oid.] (Zoöl.)

 

Defn: An order of Entomostraca possessing hard bivalve shells. They are of small size, and swim freely about. [Written also Ostracoda. ]