One who gives to another a power See power, (medicine) someone who gives blood or tissue or an organ to be used in another person (the host), Chemistry An atom, molecule, or ion that provides a part to combine with an acceptor, especially an atom that provides two electrons to form a bond with another atom, adjective_ Medicine Used for transfusion, implantation, or transplant

the relation between selected values of x and observed values of y (from which the most probable value of y can be predicted for any value of x)

extraneous noise contaminating sound measurements that cannot be separated from the desired signal

a tank or pool or bowl filled with water for keeping live fish and underwater animals