Source : Webster's Revised Unabridged Dictionary (1913)

Emersion \E*mer"sion\, n. [Cf. F. ['e]mersion. See {Emerge}.]
   1. The act of emerging, or of rising out of anything; as,
      emersion from the sea; emersion from obscurity or
      difficulties.

            Their immersion into water and their emersion out of
            the same.                             --Knatchbull.

   2. (Astron.) The reappearance of a heavenly body after an
      eclipse or occultation; as, the emersion of the moon from
      the shadow of the earth; the emersion of a star from
      behind the moon.

Source : WordNet®

emersion
     n 1: (astronomy) the reappearance of a celestial body after an
          eclipse [syn: {egress}] [ant: {ingress}, {ingress}]
     2: the act of emerging [syn: {emergence}]