from The Century Dictionary.
- The third stomach of a ruminant, technically named the omasum or psalterium: so called from the many parallel folds or layers like the leaves of a book.
from the GNU version of the Collaborative International Dictionary of English.
- noun (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
from Wiktionary, Creative Commons Attribution/Share-Alike License.
Sorry, no etymologies found.
The names given to the several cavities are the paunch, the honeycomb bag, the manyplies, and the reed.
In the former the rennet neither occupies the large paunch, nor the honeycomb bag, nor the terminal reed, but is found in the cavity which separates this terminal one from the two first, namely in the so-called manyplies.
Why it is in the manyplies that rennet is formed in animals with multiple stomachs has been stated in the Problems.
Here it is well chewed, and, being thoroughly mixed with saliva passes back; on being swallowed in a soft pulpy state it passes the groove or valve communicating with the chamber from which it issued, and goes straight into the psalterium or manyplies, as the third chamber is called.
But now, because it is soft and semi-fluid, it does not devaricate the walls of the groove communicating with the manyplies, and so, continuing on along its tubular interior, it finds its way direct into the third stomach, most of it filtering between the membrous laminae on its way to the fourth stomach, where it becomes acted on by the gastric juice.
They are, however, ruminants, having the complex stomach, composed of paunch, honeycomb-bag and reed, the manyplies being almost rudimentary; but in the true ruminants the two centre metacarpals are fused into a single bone, whilst the outer ones are rudimentary.
Nor do they go back again until they have been reduced by long mastication into an almost liquid paste, which glides through the oesophagus without forcing open the slit, and falls straight into a third pouch, called by old Frenchmen the _leaf_, on account of certain large folds, some what like the leaves of a book, which line the interior; and known to us as the _manyplies_.
After the remasticated food has reached the manyplies, the groove in the reticulum is pushed open by a fresh bolus, and so the process is repeated until the food consumed has all passed on towards the abomasum or true digestive stomach. "