pinacocyte

Etymology
From.

Noun

 * 1)  Any of a group of flattened polygonal cells that together make up the pinacoderm in the dermal epithelium of sponges.

Derived terms

 * cell which adheres to the surface to which the sponge attaches
 * cell on the inner surface of a canal of the sponge
 * cell on the exterior surface of the sponge
 * pinacocytic