baculum

Japanese: baculum
baculum

… The remaining mammalian (eutherian) penises are pendant in marsupials, have a long spine on the glans like jerboas, or are spiral-shaped like pigs. Inside the glans, there is a penis bone (baculum) in chiroptera, rodents, non-human primates, carnivores such as canids, ursidae, and mustelidae, and pinnipeds. The penis bone in bears, dogs, and weasels is rod-shaped with a groove on the underside that contains the urethra, but in squirrels and flying squirrels it is spiral-shaped, and in voles it has three finger-like bones attached to the end of the shaft, giving it a rake-like shape. …

*Some of the terminology that mentions "baculum" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 残りの哺乳類(真獣類)の陰茎は,有袋類に懸垂性のもの,亀頭にトビネズミのように長いとげをそなえたもの,ブタのようにらせん形を呈するものなどがある。また亀頭の中には,翼手類,齧歯(げつし)類,ヒト以外の霊長類,イヌ科,クマ科,イタチ科などの食肉類,鰭脚(ききやく)類などでは陰茎骨penis bone(baculum)がある。クマ,イヌ,イタチなどの陰茎骨は棒状で下面に尿道を収める溝があるが,リス,ムササビなどではらせん形,ハタネズミ類では主幹の先に3個の指状の小骨が付着していて熊手状を呈する。…

※「baculum」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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