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
Twins are divided into identical and fraternal.
twins
Siamese twins; conjoined twins
From 双 (pair) + 生 (birth). The exact historical derivation is uncertain, but the kanji combination directly conveys the meaning of twin birth.