Wordnet 3.0
ADJECTIVE (1)
1.
of or relating to the region of the continental shelf (between the seashore and the edge of the continental shelf) or the marine organisms situated there;
The Collaborative International Dictionary of English v.0.48:
Sublittoral \Sub*lit"to*ral\, a.
Under the shore. --Smart.
[1913 Webster]
WordNet (r) 3.0 (2006):
sublittoral
adj 1: of or relating to the region of the continental shelf
(between the seashore and the edge of the continental
shelf) or the marine organisms situated there