'Spiralozooid' definitions:

Definition of 'Spiralozooid'

From: GCIDE

Spiralozooid \Spi*ra`lo*zo"oid\, n. [Spiral + zooid. So called because they often have a spiral form when contracted.] (Zool.) One of the special defensive zooids of certain hydroids. They have the form of long, slender tentacles, and bear lasso cells. [1913 Webster]