An epithelial outgrowth of the cloaca in birds similar to the thymus in mammals. It atrophies within 6 months after birth and remains as a fibrous remnant in adult birds. It is composed of lymphoid tissue and prior to involution, is the site of B-lymphocyte maturation. (MeSH, 2024. Bursa of Fabricius http://id.nlm.nih.gov/mesh/D002060)
A young male or female ovine having one but not more than two permanent incisor teeth. (United Nations Economic and Social Council. 2006. TEXT RECOMMENDED FOR ADOPTION AS REVISED UNECE STANDARDS OVINE MEAT - CARCASES AND CUTS ECE/TRADE/C/WP.7/2006/12)
Note
Because of different economic values of each type of animal (lamb being the most expensive), classification systems have developed to ensure consumers receive the product they have purchased. The strict definitions for lamb, hogget and mutton vary considerably between countries.
