• (n.) One of the microsporic siliceous spicules which occur abundantly in the texture of sponges, and are sometimes found fossil, as in flints.
Spon'gi·o·lite noun [ Greek ... sponge + -lite .] (Paleon.) One of the microsporic siliceous spicules which occur abundantly in the texture of sponges, and are sometimes found fossil, as in flints.