noun
corpus spongiosum penis
Anatomical term for the spongy tissue surrounding the male urethra.
尿道海綿体は、男性の尿道を取り囲む海綿状の組織です。
The corpus spongiosum penis is the spongy tissue surrounding the male urethra.
Compound of 尿道 (urethra) + 海綿体 (corpus spongiosum). The exact historical derivation is uncertain; the spelling is conventionally associated with the anatomical meaning.