Generating Inbred Mice. Inbred Strains. A strain is defined as inbred when it has been mated brother x sister for 20 or more consecutive generations (F20). All offspring can be traced back to a single ancestral breeding pair in the 20th or subsequent generation.
suction head. The energy per unit weight of fluid on the suction side of a pump. 1  Facebook.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  head(Noun) The part of the body of an animal or human which contains the brain, mouth and main sense organs. Be careful when you pet that dog on the head; it may bite. 2  head(Noun) Mental or emotional aptitude or skill. 3  head(Noun) Mind; one's own thoughts. This song keeps going through my head.