sub-bottomn.adj.
/ˌsʌbˈbɒtəm/, U.S. /ˌsəbˈbɑdəm/ A. n.
Originally: a layer or structure that lies below the base, floor, or lowest point of something else. Later chiefly: spec. the rock strata beneath the sea bed.
ΚΠ
1871 Photogr. Mosaics 94 I forgot to say that I have a perforated sub-bottom to the case, through which I force steam from below.
1894 Official Gaz. (U.S. Patent Office) 4 Dec. 1233/1 In a flower-box... a bottom having perforations, flanges supporting said bottom, a concave sub bottom having a central opening [etc.].
1975 Background Papers on Seafloor Engin. (National Res. Council (U.S.). Committee on Seafloor Engin.) I. 355 The physical parameters that affect these characteristics, such as..seafloor roughness, sub-bottom stratification..temperature gradients in the sub-bottom.
2009 K. G. Foot in R. J. Beamish & B. J. Rothschild Future Fisheries Sci. in N. Amer. xviii. 313 [Acoustic methods]..can sense both organisms and their habitat, including water column, bottom, and sub-bottom.
B. adj.
Below the lowest level or bottom of something, (now esp.) below the sea bed.
ΘΚΠ
the world > the earth > water > sea or ocean > region of sea or ocean > [adjective] > under sea-bed
sub-bottom1949
1902 C. A. Bates Art & Lit. Business 370 I have seen an ad of an advertising agent who claimed to have ‘sub-bottom rates’.
1949 Trans. Amer. Geophysical Union 30 7 The most clear-cut sub-bottom echoes are found in the region which shows least topographic relief.
1968 R. W. Fairbridge Encycl. Geomorphol. 1227/2 Sub-bottom acoustic profiling..has demonstrated many wave-cut terraces partly hidden beneath a thin veneer of late Holocene sediments.
1975 Petroleum Rev. 29 103/1 Sub-bottom profiler.
2002 Colgate Scene (Colgate Univ., Hamilton, N.Y.) Jan. 2/4 The new view of the sedimentary structures and channel dynamics was made possible by bringing the latest technology in sub-bottom sonar profiling from the United States.
This entry has been updated (OED Third Edition, June 2012; most recently modified version published online March 2022).
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n.adj.1871- to like jam on it
- to like one's own way
- to like one's way
- to like the look of
- to like the looks of
- to like the sound of
- to like to hear oneself speak, talk
- to like want one's own way
- to like want one's way
- to liken together
- to lilt it out
- to limber up
- to limit in
- to limn the water
- to line in
- to line off
- to line one's jacket
- to line one's pockets
- to line out
- to line through
- to line up
- to linger away
- to linger on
- to link in
- to link off