Noun
A bone found in the penis of some mammals.
Synonyms: os penis, penis bone, penile bone
A small rod-like structure found in spores and pollen.
Source: en.wiktionary.orgBates et al., 2006, pp. 306–307 The glans penis of a male cape ground squirrel is large with a prominent baculum. Source: Internet
"Variability of the baculum in the red fox (Vulpes vulpes) from Slovakia." Source: Internet
The males possess a large baculum (penis bone), up to convert in length, the largest of any land mammal, both in absolute size and relative to body size. Source: Internet
The non-fallacious ad baculum This argument is of the form: :If x accepts P, then Q. :x does not want Q and will act to prevent it. Source: Internet