Quad

a.	1.	Evil; bad; baffling; as, a quade wind. Sooth play, quad play, as the Fleming saith. - Chaucer.
n.	1.	(Print.) A quadrat.
	1.	(Arch.) A quadrangle; hence, a prison.

Noun	1.	quad - one of four children born at the same time from the same pregnancy Synonyms: quadruplet
	2.	quad - a muscle of the thigh that extends the leg Synonyms: musculus quadriceps femoris, quadriceps, quadriceps femoris
	3.	quad - (printing) a block of type without a raised letter; used for spacing between words Synonyms: space
	4.	quad - a rectangular area surrounded on all sides by buildings Synonyms: quadrangle

1.		quad - Two bits; synonym for quarter, crumb, tayste.
2.		quad - A four-pack of anything (compare hex).
3.		quad - The rectangle or box glyph used in the APL language for various arcane purposes mostly related to I/O. Former Ivy-Leaguers and Oxford types are said to associate it with nostalgic memories of dear old University (short for "quadrangle").