Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Being below the bottom of something.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

sub- +‎ bottom

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Examples

  • We can monitor the ship's position, heading and speed; wind speed and direction; activity throughout the ship on the closed-circuit TV system; the firing status of each of the 10 air guns; the subbottom profiler; the multibeam; and the geometry of the hydrophone array, in depth and in map view, strung out behind us, extending six kilometers back toward where we've been.

    NYT > Home Page By BERNARD COAKLEY 2011

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