balance
[bal´ans] an instrument for weighing.
analytical balance a balance used in the laboratory, sensitive to variations of the order of 0.05 to 0.1 mg.
fluid balance see fluid balance.
negative balance a state in which the amount of water or an electrolyte excreted from the body is greater than that ingested.
positive balance a state in which the amount of water or an electrolyte excreted from the body is less than that ingested.
water balance fluid balance.
zero balance a state in which the amount of water or an electrolyte excreted from the body is exactly equal to that ingested; see
equilibrium (def. 1).
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.