ˈnäməˌgram, ˈnōm- noun
or nom·o·graph -raf
Etymology: International Scientific Vocabulary nomo- + -gram or -graph
: a graphic representation of numerical relations by any of various systems ; specifically : a graph that enables one by the aid of a straightedge to read off the value of a dependent variable when the values of two or more independent variables are given
if the viscosity of a slag is known at one temperature, the entire viscosity-temperature relationship for the liquid slag can be ascertained from the nomogram … which readily gives the viscosity of a liquid slag at any desired temperature if the viscosity is known at a particular temperature — Kent's Mech. Engineers' Handbook