mutton
Older sheep is called mutton and has a much stronger flavor and tougher meat that many find distasteful. [1]
The best way to cook any cut of mutton is very long and slowly. [2]
There is indeed a difference between lamb and mutton, but it’s simply a matter of age and flavor. [1]
Lamb, hogget, and mutton are the meat of domestic sheep. [...] The meat of an animal in its first year is lamb; that of an older sheep is hogget and later mutton. [3]
The cuts are leg, loin (chops and roasts), rack (rib chops and French chops), chuck, breast, and flank. [4]
Lamb chops are cut from the rib, loin, and shoulder areas. [3]
Older sheep produce a richer flavor, but it can be tough if not cooked properly. [2]
In Middle Eastern countries it is a staple meat, but in the West, with the exception of Great Britain, Australia, and New Zealand, mutton and lamb comprise only a small proportion of the total meat consumption. [4]
Mutton was a cheap food source for the military, and it was often overcooked and dry. [1]
It is popular in Middle Eastern and British cooking. [2]
Meat from the fully grown sheep, Ovis aries. [4]
The French term means “salty field,” and is applied to lamb that graze on meadowlands on the salty shores of Brittany and Normandy. [1]
Leg of lamb is a whole leg; saddle of lamb is the two loins with the hip. [3]
The flesh of fully grown sheep. [4]
Sources:
[1] What is the difference between lamb and mutton? (homecooking.about.com/od/
[2] Mutton - What is Mutton? (mideastfood.about.com/od/glossary/
[3] Lamb and mutton - Wikipedia, the free encyclopedia (en.wikipedia.org/wiki/Mutton)
[4] mutton: Definition from Answers.com (www.answers.com/topic/mutton)