coyote hole

coyote hole

[′kī‚ōd·ē ‚hōl]
(engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
From the early 1880s (and likely even earlier), Korean miners dug "coyote hole" tunnels a small tunnels that wound about following small veins of gold.