OBSOLETE. Any of the small, heterogeneous, artifactual, vesicular particles, 50-150 nm in diameter, that are formed when some eukaryotic cells are homogenized and that sediment on centrifugation at 100000 g.
Source:ISBN:0198506732
Comment
This term was made obsolete because it refers to a cell fractionation experimental result and not a bona fide cellular component.