[ 'nɒməgram , 'nəʊm- ]
(also nomograph )
■ noun a diagram representing the relations between three or more variable quantities by means of a number of scales, so arranged that the value of one variable can be found geometrically.
Derivatives
nomographic adjective
nomographically adverb
nomography nə'mɒgrəfi noun
Origin
early 20th cent.: from Gk nomos 'law' + -gram 1 .