Word Study
sirloin
CIDE DICTIONARY
sirloin, n. [A corruption of surloin. Not so called because this cut of beef was once jocosely knighted (dubbed Sir Loin) by an English king, as according to a popular story.].
A loin of beef, or a part of a loin. [1913 Webster]
OXFORD DICTIONARY
sirloin, n. the upper and choicer part of a loin of beef.
Etymology
OF (as SUR-(1), LOIN)
THESAURUS
sirloin
Chateaubriand, blade roast, breast, brisket, chuck, chuck roast, clod, cold cuts, filet mignon, flank, knuckle, loin, plate, plate piece, pot roast, rack, rib roast, ribs, roast, rolled roast, round, rump, rump roast, saddle, shank, short ribs, shoulder, shoulder clod, tenderloinFor further exploring for "sirloin" in Webster Dictionary Online