emersion

Emersion is when something that's been out of sight appears or emerges. The emersion of your friend's head from the water is a relief if he's been holding his breath at the bottom of the pool for a really long time.

It's especially common to use the noun emersion when you're talking about something or someone rising from the water after being submerged beneath the surface. On a whale watch, people gaze at the ocean hoping to see the emersion of a whale, and in many harbors you can also see the emersion of seals' heads if you watch the water long enough. It's easy to confuse emersion with its opposite, immersion. Emersion shares a Latin root with emergeemergere, "rise up."

Definitions of emersion
  1. noun
    the act of emerging
    synonyms: emergence
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    type of:
    appearance
    the act of appearing in public view
  2. noun
    (astronomy) the reappearance of a celestial body after an eclipse
    synonyms: egress
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    Antonyms:
    immersion, ingress
    (astronomy) the disappearance of a celestial body prior to an eclipse
    type of:
    reappearance
    the event of something appearing again
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