Dictionary
sub•ma•trix
Pronunciation: (sub-mā'triks, -ma'triks), [key]—
n.,
—pl. -tri•cesPronunciation: (-tri-sēz"), [key] -trix•es.
Math.
a set of certain rows and columns of a given matrix.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.