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L

Leukocyte

white blood cell


Leukocytosis

an abnormal increase in the number of white blood cells in the blood


Licensed drug

Medication which has been approved to be given to animals

Light Beam Diaphragm (LBD)

a device fitted to the tube head for altering the size of the primary beam


Line breeding

similar to inbreeding but involves breeding from family lines that are not closely related e.g. grandparents or cousins. The aim is to increase the likelihood of the desired characteristics, but reduce the chances of those that are not desired.


Linked genes

gene that are so close together on the same chromosome that they move with each other into the same cells during meiosis and do not act independently


Locus

the position of a gene on a chromosome


Lordosis

excessive inward curvature of the spine. In female cats, it is a behaviour pattern exhibited during the oestrous cycle, where they raise the tail and hindquarters.


Low voltage transformer

decreases the incoming mains voltage (240 V) to provide small current to the filament and prevent overheating

Lymph

excess tissue fluid carried in the lymphatics. Has similar constituents to plasma but contains fewer plasma proteins.


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