The Collaborative International Dictionary
honeycomb stomach
Reticulum \Re*tic"u*lum\, n.;pl. Reticula. [L. dim. of rete a net.] (Anat.)
The second stomach of ruminants, in which folds of the mucous membrane form hexagonal cells; -- also called the honeycomb stomach.
The neuroglia.
Wiktionary
honeycomb stomach
n. A reticulum (second stomach of a ruminant)