n, pl  -la   1  :  the second compartment of the stomach of a ruminant in which folds of the mucous membrane form hexagonal cells - called also honeycomb  - compare ABOMASUM OMASUM RUMEN   2  :  a reticular structure  :  NETWORK: as  a  :  the network of interstitial tissue composed of reticular fibers - called also reticular tissue   b  :  the network often visible in fixed protoplasm both of the cell body and the nucleus of many cells .
 
 
 
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