stythe

from The Century Dictionary.

• noun A sty.
• noun Choke-damp; after-damp; black-damp; the mixture of gases left after an explosion of fire-damp, and consisting chiefly of carbonic-acid gas; also, more rarely, this gas accumulated in perceptible quantity in any part of a coal-mine, whether arising from respiration of men or animals, from the use of gunpowder, or from the burning of lamps or candles.

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

• noun (Mining) Choke damp.

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

• noun choke damp