source: Ram y rem | Re:Zero •Amino• Amino

1. one of two children or animals born at the same birth.

双子の一方; 〖～s〗 双子, 双生児

a person or thing that is exactly like another:

«…に» よく似ている物［人］ «to» , 対の一方; ; 〖～s〗 一対.

e.g. there was a bruise on his cheek, a twin to the one on mine.

(the Twins) the zodiacal sign or constellation Gemini.

〖the Twins〗〘天〙 ふたご座, 双児宮(Gemini)

2. something containing or consisting of two matching or corresponding parts.

a twin-bedded room.

a twin-engined aircraft.

a twinned crystal.

〘結晶〙 双晶

adjective attributive

forming, or being one of, a pair born at one birth:

双子の

e.g. she gave birth to twin boys

e.g. her twin sister.

forming a matching, complementary, or closely connected pair:

対をなす, 対の; ツインの; ｟英｠ 姉妹関係にある〈都市など〉

(関連する･同時に存在する)2つの, 二重の〈問題･目標･義務など〉

e.g. the twin problems of economic failure and social disintegration.

Botany growing in pairs:

〘動･植〙 双生の

e.g. twin seed leaves.

(of a bedroom) containing two single beds.

(of a crystal) twinned.

双晶の 〘結晶〙

verb (twins, twinning, twinned) with object

link; combine:

«…と» 対になっている «with» .

e.g. the company twinned its core business of brewing with that of distilling.

late Old English twinn‘double’, from twi-‘two’; related to Old Norse tvinnr. Current verb senses date from late Middle English.