An Etymological Dictionary of Astronomy and Astrophysics

1. Coming into being or notice.
   

   2. Philo.: (of a property) arising as an effect of complex causes and not analyzable simply as the sum of their effects.
      

   3. Ecology: Of or denoting a plant which is taller than the surrounding vegetation, especially a tall tree in a forest (OxfordDictionaries.com).

See also: → emerge; → -ent.