also: そうし
Refers either to the pair of children born from the same pregnancy or to one member of such a pair. Commonly used as 双子の兄, 双子の姉妹, 双子を産む, and similar expressions.
彼女は双子を産んだ。
She gave birth to twins.
私には双子の兄がいる。
I have an older twin brother.
双子でも性格は全然違う。
Even though they are twins, their personalities are completely different.
She gave birth to twins last month.
He is my twin brother.
They are identical twins and look very much alike.
Practical kana spelling, often used when a softer or easier-to-read style is preferred.
Attested kanji spelling, uncommon for the ordinary word 'twins'.
Attested mixed kana-kanji spelling, but much less common than 双子.