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pace beneath the surface of the ground; subterranean space. A spirit raised from depth of underground. Shak.

Wildcat insurance.

forming, or existing in the air, as opposed to growing or existing in earth or water, or underground; as, aërial rootlets, aërial plants. Gray.

The upper part of a lode, or the roof of a horizontal underground passage.

for light railways, in which the actuating current passes along a wire or rail laid in an underground conduit, from which the current is "picked up" by a plow or other device fixed to the car or electric locomotive. Hence Conduit railway.

A miner's underground working time or shift. Raymond.

An underground gallery excavated to intercept and destroy the mining of an enemy.

A species of pea (Amphicarpæa monoica). It is a climbing leguminous plant, with hairy underground pods.

, a pond, the bottom of which is a filter composed of sand gravel. -- Filter gallery, an underground gallery or tunnel, alongside of a stream, to collect the water that filters through the intervening sand and gravel; -- called also infiltration gallery.

reproductive bodies, as in Amphicarpæa, in which besides the usual pods, there are others underground.

s. Geog.) The aqueous envelope of the earth, including the ocean, all lakes, streams, and underground waters, and the aqueous vapor in the atmosphere.

change through the gradual transfer of material by volcanic eruption, the circulation of underground water, and the process of erosion and deposition. It is, therefore, regarded as a third mobile envelope comparable with the hydrosphere and atmosphere.

A passage underground through which ore is shot.

A plow of peculiar construction, for forming underground drains. [U.S.] Duck mole. See under Duck. -- Golden mole. See Chrysochlore. -- Mole cricket (Zoöl.), an orthopterous insect of the genus Gryllotalpa, which excavates subterranean galleries, and throws up mounds of earth resembling those of the mole. It is said…

e under American, a. -- Native bear (Zoöl.), the koala. -- Native bread (Bot.), a large underground fungus, of Australia (Mylitta australis), somewhat resembling a truffle, but much larger. -- Native devil. (Zoöl.) Same as Tasmanian devil, under Devil. -- Native hen (Zoöl.), an Australian rail (Tribonyx Mortierii).…

The laying of conducting pipes underground, as for water, gas, etc.

A small wagon used for the underground work of a mine. Tomlison.

The wedging, as of a horse or car, against the top of an underground passage. Raymond.

The underground portion of a plant, whether a true root or a tuber, a bulb or rootstock, as in the potato, the onion, or the sweet flag.

A perennial underground stem, producing leafly s