Definition of pelagial in US English:

pelagial

noun

Ecology
  • The main body of water of a lake or sea, contrasted with the littoral and benthic regions.

adjective

Ecology
  • Of, relating to, or designating this region.

Origin

Late 19th century; earliest use found in Science. From classical Latin pelagius of or belonging to the sea + -al, perhaps after German pelagial.

Pronunciation

pelagial

/pɪˈleɪdʒ(ɪ)əl/