datum Meaning, Definition & Usage

noun an item of factual information derived from measurement or research
data point.

L. See 2d Date.

plural Data

Something given or admitted; a fact or principle granted; that upon which an inference or an argument is based; -- used chiefly in the plural.
Any writer, therefore, who . . . furnishes us with data sufficient to determine the time in which he wrote. Priestley.
pl. (Math.) The quantities or relations which are assumed to be given in any problem.