Source : Webster's Revised Unabridged Dictionary (1913)

Increscent \In*cres"cent\, a. [L. increscens, -entis, p. pr. of
   increscere. See {Increase}.]
   1. Increasing; growing; augmenting; swelling; enlarging.

            Between the incresent and decrescent moon.
                                                  --Tennyson.

   2. (Her.) Increasing; on the increase; -- said of the moon
      represented as the new moon, with the points turned toward
      the dexter side.