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subterrestrial

adjective
sub·​terrestrial | \¦səb+\

Definition of subterrestrial 

(Entry 1 of 2)

: subterranean

subterrestrial

noun
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Definition of subterrestrial (Entry 2 of 2)

: one (such as an animal) that lives underground

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History and Etymology for subterrestrial

Adjective

sub- + terrestrial

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