Search Result for "oceanic abyss":
Wordnet 3.0

NOUN (1)

1. a long steep-sided depression in the ocean floor;
[syn: trench, deep, oceanic abyss]



WordNet (r) 3.0 (2006):

oceanic abyss
    n 1: a long steep-sided depression in the ocean floor [syn:
         trench, deep, oceanic abyss]