pyriform adjective. ['pɪrɪfɔ:m] Also piriform. M18.
[mod. Latin pyriformis, from pyrum misspelling of pirum pear: see -FORM.]
Chiefly Anatomy. Pear-shaped.
pyriform fossa either of two depressions on each side of the opening to the larynx. pyriform muscle a hip muscle which rotates the extended thigh laterally and abducts the flexed thigh.

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