Word Study
introgression
CIDE DICTIONARY
introgression, n. [L. introgressus, p. p. of introgredi to go in; intro- within + gradi to step, go.].
The act of going in; entrance. Blount. [1913 Webster]
ROGET THESAURUS
introgression
Ingress
N ingress, entrance, entry, introgression, influx, intrusion, inroad, incursion, invasion, irruption, ingression, penetration, interpenetration, illapse, import, infiltration, immigration, admission, insinuation, insertion, inlet, way in, mouth, door, barway, path, conduit, immigrant, incoming.For further exploring for "introgression" in Webster Dictionary Online