Also found in: Medical.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a network of fibrils that, together with ribonucleoprotein granules and an amorphous substance, forms the nucleoli of plant and animal cells.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.