Hypertext Webster Gateway: "Subterraneous"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Subterranean \Sub`ter*ra"ne*an\, Subterraneous
\Sub`ter*ra"ne*ous\, a. [L. subterraneus; sub under + terra
earth. See {Terrace}.]
Being or lying under the surface of the earth; situated
within the earth, or under ground; as, subterranean springs;
a subterraneous passage. -- {Sub`ter*ra"ne*ous*ly}, adv.
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