respiratory dead space
Also found in: Dictionary, Medical.
respiratory dead space[′res·prə‚tȯr·ē ′ded ‚spās]
That part of the respiratory system which has no alveoli and in which little or no exchange of gas between air and blood takes place.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.