adjective: (algebra, of a ring) Being a commutative reduced ring in which, whenever x, y satisfy x³=y², there is s with s²=x and s³=y.
adjective: (group theory) Of a subgroup A of a group G, having a subgroup B such that AB = G, and for any proper subgroup C of B, AC is a proper subgroup of G.
adjective: (default logic, of a default) Having all its justifications entailing its conclusion.