Introgression

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Introgression \In`tro*gres"sion\, 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]