animal (an´i-mal)

1. A living, sentient organism that has membranous cell walls, requires oxygen and organic foods, and is capable of voluntary movement, as distinguished from a plant or mineral. 2. One of the lower a. organisms as distinguished from humans. [L.]
cold-blooded a. poikilotherm
control a. in research, an a. submitted to the same conditions as the others used for the experiment, but with the crucial factor (such as the injection of antitoxin, the administration of a drug, etc.) omitted. See also control, control experiment.
conventional a. an a. colonized by the burden of resident microorganisms normally associated with its particular species.
Houssay a. an a. that has been pancreatectomized and hypophysectomized. Named after the discoverer of the principle that a.'s are more sensitive to insulin after removal of the pituitary, and that after this operation the intensity of diabetes in depancreatized a.'s is diminished.
normal a. in research, an experimental a. that has neither suffered an attack of a particular disease nor received an injection of a specific microorganism or its toxin.
sentinel a. an a. deliberately placed in a particular environment to detect the presence of an infectious agent, such as a virus.
warm-blooded a. homeotherm


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