fra·ter·nal
frə-ˈtər-nᵊl
1
a
: of, relating to, or involving brothers
fraternal love
b
: of, relating to, or being a fraternity or society
a fraternal order
a fraternal chapter house
2
: derived from two ova : dizygotic
fraternal twins
plural -s
1
a
: the state of being fraternal
b
: fraternal feeling
2
: the theoretic justification of fraternal societies or their practices
also
: the advocacy of fraternal societies
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Merriam-Webster unabridged



