com-pernis

e, adj.

perna

I. with the knees bent inwards, knock-kneed, Lucil. ap. Non. p. 26, 3; Plaut. Fragm. ap. Fest. p. 375, 20 Müll.; Varr. L. L. 9, § 10 Müll.
Lewis & Short
A Latin Dictionary, 1879
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