"fraternal" in the adjective sense
1. fraternal
of or relating to a fraternity or society of usually men
"a fraternal order"
2. fraternal, biovular
of twins) derived from two separate fertilized ova
"fraternal twins are biovular"
3. brotherly, brotherlike, fraternal
like or characteristic of or befitting a brother
"brotherly feelings"
"close fraternal ties"
Source: WordNet® (An amazing lexical database of English)
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