nomograph

nom·o·graph

or nom·o·gram

noun

A graph consisting of three coplanar curves, each graduated for a different variable so that a straight line cutting all three curves intersects the related values of each variable.
A chart representing numerical relationships.

Origin of nomograph

Greek nomos law ; see nem- in Indo-European roots. -graph

Related Forms:

nom′o·graph′ic
adjective

no·mog′ra·phy
noun

THE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.