Source : Webster's Revised Unabridged Dictionary (1913)

Laconism \Lac"o*nism\, n. [Gr. ?, fr. ? to imitate
   Laced[ae]monian manners, to speak laconically: cf. F.
   laconisme.]
   1. A vigorous, brief manner of expression; laconic style.

   2. An instance of laconic style or expression.

Source : WordNet®

laconism
     n : terseness of expression [syn: {laconicism}]