资料来源 : Webster's Revised Unabridged Dictionary (1913)

Benthal \Ben"thal\, a. [Gr. ? the depth of the sea.]
   Relating to the deepest zone or region of the ocean.

资料来源 : WordNet®

benthal
     adj : of or relating to or happening on the bottom under a body of
           water [syn: {benthic}, {benthonic}]