rathole
WordNet
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(n)
rathole
a small dirty uncomfortable room -
(n)
rathole
a hole (as in the wall of a building) made by rats
Usage in the news
Sometimes, when a vessel is emptied from the bottom, the voids form tunnels called ratholes. controlglobal.com
For example, adding "ratholing" or "angle of repose" to a search for "level" will pull up items on how to measure down into the cone areas of vessels. controlglobal.com
Usage in literature
He calls it a rathole. "The Shuttle" by
There was nothing to do but turn back to Rathole and see if some other way could not be found. "Wind" by
He knew every rathole of the system, with the same intimacy the rats knew them. "Shock Treatment" by