twin brother
Same-womb male sibling
A twin brother is a male sibling born from the same pregnancy.
The term specifies both the relationship (twin) and the sex (brother): My twin brother and I look nothing alike.
Twins may be identical (from one egg) or fraternal (from two).
The phrase often appears when distinguishing from a twin sister or emphasizing the bond: He's not just my brother—he's my twin brother.
- doppelgängerGhostly identical counterpart
- siblingBrother or sister
- familyRelated people together
- blood relativeFamily by biological descent
- mirror imageReversed visual duplicate
zygote · duality · bond · embryo · Romulus and Remus · identity · heredity · genetic match · twinship · relative · rivalry · kin · firstborn · DNA · chromosome · myth · separated at birth · pair
- Brothersbro, half brothers, stepbrothers, stepbrother, brotherhood
- twinstwins, identical, fraternal, monozygotic, dizygotic
- siblingssister, twins, siblings, brothers, sisters
- menman, guys, male, blokes, guy
- doublesdouble, doubles, twins, duplicate, duplicates
sibling relationship type
twin brotheronly child
Person without siblings
half-brother · stepbrother · distant cousin · adopted brother · older sibling