underviewer

from The Century Dictionary.

• noun In coal-mining, the manager or superintendent of the mine and of the underground workings; the under-looker, in some coal-mining districts of England: nearly the same as the mining captain in a metal-mine.

from the GNU version of the Collaborative International Dictionary of English.

• noun See underlooker.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An underlooker.