(Also as two words.) [TWIN a. 3.] A brother born at the same birth, as one of twins. Also fig. something closely related to or resembling the other thing mentioned.
1598. Shaks., Merry W., II. i. 74. Heere’s the twyn-brother of thy Letter: but let thine inherit first, for I protest mine neuer shall.
1727. Swift, Wonder of Wonders, Wks. 1755, II. II. 51. He hath … a twin-brother, who lives over against him.
1829. Lytton, Devereux, I. iii. My twin brother, Gerald, was a tall, strong, handsome boy.
1850. Tennyson, In Mem., lxviii. Sleep, Death’s twin-brother.
