Hypertext Webster Gateway: "adit"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Adit \Ad"it\, n. [L. aditus, fr. adire, ?aitum, to go to; ad +
ire to go.]
1. An entrance or passage. Specifically: The nearly
horizontal opening by which a mine is entered, or by which
water and ores are carried away; -- called also {drift}
and {tunnel}.
2. Admission; approach; access. [R.]
Yourself and yours shall have Free adit. --Tennyson.
From WordNet (r) 1.7 (wn)
adit
n : a nearly horizontal passage from the surface into a mine
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