Hypertext Webster Gateway: "manhole"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Manhole \Man"hole`\, n.
A hole through which a man may descend or creep into a drain,
sewer, steam boiler, parts of machinery, etc., for cleaning
or repairing.
From WordNet (r) 1.7 (wn)
manhole
n : a hole (usually with a flush cover) through which a person
can gain access to an underground structure
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