pessulus


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pessulus

[′pes·yə·ləs]
(vertebrate zoology)
A bar composed of cartilage or bone that crosses the windpipe of a bird at its division into bronchi.

pessulus

A bolt for fastening a leaf of an ancient Roman door. These doors, usually having two leaves, had two (sometimes four) bolts fixed to them—one at the top and one at the bottom of each leaf.