Ga"noid (?), a. [Gr. ? brightness +
-oid.] (Zoöl.) Of or pertaining to Ganoidei.
-- n. One of the Ganoidei.
Ganoid scale (Zoöl.), one kind
of scales of the ganoid fishes, composed of an inner layer of bone,
and an outer layer of shining enamel. They are often so arranged as
to form a coat of mail.