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n. pl. bac·u·la or bac·u·lums
The bone of the penis of many mammals, including most rodents, carnivores, and nonhuman primates. Also called os penis.

[New Latin, from Latin, rod, stick; see bak- in Indo-European roots.]


n, pl -la (-lə) or -lums
(Zoology) a bony support in the penis of certain mammals, esp the carnivores
[C20: New Latin, from Latin: stick, staff]