Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: subterraneus, from terra 'earth'

subterranean

 adjective
     
Related topics: Earth Sciences
sub‧ter‧ra‧ne‧an [usually before noun]
HE beneath the surface of the Earth:
subterranean passage
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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