noun.
A molecular complex of a cell through the union with which alien cell-products or cell-constituents can produce, their specific effects upon the coll. These same receptors, owing to the presence of which the cell is open to attack, when cast off from the cell constitute its most effective defenses. Also called side-chain. See immunity, 5.
noun.
In wireless telegraphy, a receiver.
noun.
The terminal expansion in skin or mucous membranes of a sensory nerve.