\Ma"ny*plies\, n. [Many, adj. + plies, pl. of ply a
fold.] (Anat.)
The third division, or that between the reticulum, or
honeycomb stomach, and the abomasum, or rennet stomach, in
the stomach of ruminants; the omasum; the psalterium. So
called from the numerous folds in its mucous membrane. See
Illust of {Ruminant}.