monkey heading

monkey heading

[′məŋ·kē ‚hed·iŋ]
(mining engineering)
A narrow, low passage in the coal, providing refuge for miners while coal is blasted.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
While the group is resting and playing, Ledan notices another male proboscis monkey heading right for him.
Monkey business
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