noun, noun which may take the genitive case particle 'no'
twins; bearing twins
Refers to the state of being twins or giving birth to twins. Often used in compounds like 双生児 (twin children).
彼女は双生の姉妹です。
She is a twin sister.
双生児は一卵性と二卵性に分けられる。
Twins are divided into identical and fraternal.