noun
ovary
Standard anatomical term for the female reproductive organ that produces eggs.
卵巣は女性の生殖器の一部です。
The ovaries are part of the female reproductive organs.
卵巣のう腫が見つかりました。
An ovarian cyst was found.
精巣 means 'testis', the male reproductive organ, while 卵巣 is the female 'ovary'.
Compound of 卵 (らん, 'egg') and 巣 (そう, 'nest'), literally 'egg nest'. The term is a modern anatomical coinage.