Akademik

quad
1.
n. colloq. a quadrangle.
Etymology: abbr.
2.
n. colloq. = QUADRUPLET 1.
Etymology: abbr.
3.
n. Printing a piece of blank metal type used in spacing.
Etymology: abbr. of earlier QUADRAT
4.
n. & adj.
—n. quadraphony.
—adj. quadraphonic.
Etymology: abbr.

Useful english dictionary. 2012.