RhymeZone: fraternal definitions

Definitions of fraternal:

adjective: of or relating to a fraternity or society of usually men
Example: "A fraternal order"
adjective: (of twins) derived from two separate fertilized ova
Example: "Fraternal twins are biovular"
adjective: like or characteristic of or befitting a brother
Example: "Close fraternal ties"

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See fraternal used in context: several books and articles.