'Silicoidea' definitions:
Definition of 'Silicoidea'
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Silicoidea \Sil`i*coi"de*a\, n. pl. [NL. See Silex, and
-oid.] (Zool.)
An extensive order of Porifera, which includes those that
have the skeleton composed mainly of siliceous fibers or
spicules.
[1913 Webster]
