subseaadj.adv.
/ˈsʌbsiː/, /sʌbˈsiː/, U.S. /ˈsəbˌsi/, /ˌsəbˈsi/ Now chiefly Oil Industry.
A. adj.
Situated or occurring beneath the surface of the sea.
ΘΚΠ
the world > the earth > water > sea or ocean > region of sea or ocean > [adjective] > below surface
under-sea1613
submarine1626
subsea1883
society > occupation and work > industry > drilling for oil or gas > [adjective] > beneath the sea
subsea1962
offshore1966
1817 New Monthly Mag. Mar. 126 Mr. B. then ironises and triumphs away with certain states of rocks which, as he conceives, refute my assertion of their sub-sea-formation.]
1883 R. Brown Eridanus xviii. 40 Here we meet with the Nile as credited with a subsea course.
1909 C. M. Doughty Cliffs 57 We've seaborne, airborne and now subsea fleets.
1962 Offshore July 19 Equipment manufacturers have accelerated their research and development of sub-sea wellheads and auxiliary equipment.
1984 Pop. Mech. Aug. 117/1 The 1.25 million cubic feet of gravel fill that sits on a subsea ledge.
2005 Wired Dec. 243/4 Oil's new frontier is subsea operations—wells that sprawl over hundreds of square miles of seabed.
B. adv.
Beneath the surface of the sea.
ΘΚΠ
the world > the earth > water > sea or ocean > [adverb] > below surface
under-line1605
undersea1684
subsea1922
society > occupation and work > industry > drilling for oil or gas > [adverb] > beneath the sea
subsea1942
1922 Wall St. Jrnl. 7 Apr. 2/2 Average depth of 1,354 feet, sub-sea.
1942 E. M. Thom Bibliogr. N. Amer. Geol. 1940–1 68 The No. 1 B Swenson well found granite at a depth of 5,810 ft. subsea.
1971 Bull. Amer. Assoc. Petroleum Geologists 55 1694/2 The gas-oil contact is at 6,636 ft subsea.
2010 Offshore (Nexis) Aug. 30 The deep reservoirs of the Central Graben—typically 15,000 to 20,000 ft (4,572—6,096 m) subsea—and the deep waters of the Atlantic margin present different challenges.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
<
adj.adv.1883