Webster
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Webster’s Revised Unabridged Dictionary · 1913

Acnode

Ac′node, n. [L. acus needle + E. node.] (Geom.) An isolated point not upon a curve, but whose coördinates satisfy the equation of the curve so that it is considered as belonging to the curve.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek set in Greek letters; entries of one spelling made one article.