'Emersion' definitions:

Definition of 'emersion'

noun

(astronomy) the reappearance of a celestial body after an eclipse [syn: egress, emersion] [ant: immersion, ingress]

noun

The act of emerging [syn: emergence, emersion]

From: GCIDE

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. [1913 Webster]
Their immersion into water and their emersion out of the same. --Knatchbull. [1913 Webster]
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. [1913 Webster]