nonmetric reference

nonmetric reference

[¦nän′me·trik ′ref·rəns]
(anthropology)
One of a group of features that can be counted rather than measured‒for example, accessory bones in the sutures of the skull and lingual ridges in the incisor teeth.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.