Found in the following dictionaries
Enable (Words with friends)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
SOWPODS (Collins Scrabble Words)
OTCWL2014 (NASPA Word List 2014)
TWL06 (NASPA List 2006)
"Quark" Definition
noun
A soft creamy acid-cured cheese of central Europe made from whole milk.
Source: American Heritage Dictionary
Any of a group of six elementary particles having electric charges of a magnitude one-third or two-thirds that of the electron, regarded as constituents of all hadrons. See Table at subatomic particle.
Source: American Heritage Dictionary
Any of several elementary particles that are postulated to come in pairs (as in the up and down varieties) of similar mass with one member having a charge of + and the other a charge of − and are held to make up hadrons.
Source: Merriam-Webster