pinacocyte noun1 •Any of a group of flattened polygonal cells that together make up the pinacoderm in the dermal epithelium of sponges.Minchin (1896, 1898, 1908) also concluded that the pinacocytes could leave the dermal epithelium and become calcoblasts in both larva and adult sponge. — 1961 formspinacocytes
