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.
Head (linguistics) In linguistics, the head of a phrase is the word that determines the syntactic category of that phrase. For example, the head of the noun phrase boiling hot water is the noun water. Analogously, the head of a compound is the stem that determines the semantic category of that compound.