(n.) A small air cell, or globular space, in the interior of organic cells, either containing air, or a pellucid watery liquid, or some special chemical secretions of the cell protoplasm.

Golgi apparatus aster basal body cell membrane central apparatus central body centriole centroplasm centrosome centrosphere chloroplast chromoplast cilia cytocentrum flagella kinoplasm microbody microcentrum mitochondrion pili plasmodesmata plastid plastosome ribosome spherosome spindle fibers