an arrangement of two linear or logarithmic scales such that an intersecting straight line enables an intermediate value or values on a third scale to be read off
2.
any graphic representation of numerical relationships
Word origin
C20: from Greek nomos law + -gram, on the model of French nomogramme
nomogram in American English
(ˈnɑməˌgræm; ˈnoʊməˌgræm)
noun
a set of scales for the variables in a problem which are so distorted and so placed that a straight line connecting the known values on some scales willprovide the unknown values at its intersections with other scales