gammoid

== English == === Etymology === Named by J. H. Mason in a 1972 paper (On a Class of Matroids Arising From Paths in Graphs). === Noun === gammoid (plural gammoids) (mathematics) A certain kind of matroid, describing sets of vertices that can be reached by vertex-disjoint paths in a directed graph. === Adjective === gammoid (comparative more gammoid, superlative most gammoid) Shaped like a gamma.