In heraldry, argent is the tincture with the colour silver, very frequently depicted as, and supposed almost to be interchangable with, white. (However, Arthur Charles Fox-Davies argued extensively in his book The Art of Heraldry: An Encyclopaedia of Armory that, though extremely rare, the colour white existed as a separate colour in heraldry, typically in the white [never described or depicted as argent] labels borne by members of the British Royal Family.) In Latin, argentum is "white money, or silver".
Argent was the name of a rock band founded in 1970 by Rod Argent after his previous band, The Zombies, broke up. Their biggest hit was "Hold Your Head Up".