suboceanic

[ suhb-oh-shee-an-ik ]
/ ˌsʌb oʊ ʃiˈæn ɪk /

adjective

occurring or existing below the floor of the ocean: suboceanic oil.
of, relating to, or on the floor of the ocean: suboceanic plants.
Also sub·o·cean [suhb-oh-shuh n] /sʌbˈoʊ ʃən/.

Origin of suboceanic

First recorded in 1855–60; sub- + oceanic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for suboceanic

suboceanic

/ (sʌbˌəʊʃɪˈænɪk) /

adjective

formed or situated beneath the ocean or ocean floor
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012