'Spiculum' definitions:

Definition of 'spiculum'

From: WordNet
noun
Small pointed structure serving as a skeletal element in various marine and freshwater invertebrates e.g. sponges and corals [syn: spicule, spiculum]

Definition of 'Spiculum'

From: GCIDE
  • Spiculum \Spic"u*lum\, n.; pl. Spicula. [L., a little point.] (Zool.) Same as Spicule. [1913 Webster]