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A low spot surrounded by elevations; a depressed part of a surface; a concavity; a channel. Forests grew Upon the barren hollows. Prior. I hate the dreadful hollow behind the little wood. Tennyson.

Flat; even; -- a term applied to surfaces and to spaces, whether real or imagined, in which the definitions, axioms, and postulates of Euclid respecting parallel straight lines are assumed to hold true.

ing to, or including, similar forms or kinds of life; as, homoeozoic belts on the earth's surface. E. Forbes.

molographic projection, a method of constructing geographical charts or maps, so that the surfaces, as delineated on a plane, have the same relative size as the real surfaces; that is, so that the relative actual areas of the different countries are accurately represented by the corresponding portions of the map.…

The circle which bounds that part of the earth's surface visible to a spectator from a given point; the apparent junction of the earth and sky. And when the morning sun shall raise his car Above the border of this horizon. Shak. All the horizon round Invested with bright rays. Milton.

Parallel to the horizon; on a level; as, a horizontalline or surface.

The line or surface in which are situated all the points which are seen single while the point of sight, or the adjustment of the eyes, remains unchanged. The sum of all the points which are seen single, while the point of sight remains unchanged, is called the horopter. J. Le Conte.

o, in conjunction with mechanical pressure, for the purpose of giving a smooth and glosay surface, or to express oil, etc.; as, to hotpress paper, linen, etc.

Spread over the surface of the ground; procumbent. Gray.

A rounded knoll or hillock; a rise of ground of no great extent, above a level surface.

with a boatlike or other understructure that enables it to travel on, or to rise from the surface of, a body of water by its own motive power.

The science of water, its properties, phenomena, and distribution over the earth's surface.

A chart or graphic representation of the average distribution of rain over the surface of the earth.

The spore-bearing surface of certain fungi, as that on the gills of a mushroom.

A surface of the second order, which is cut by certain planes in hyperbolas; also, the solid, bounded in part by such a surface. Hyperboloid of revolution, an hyperboloid described by an hyperbola revolving about one of its axes. The surface has two separate sheets when the axis of revolution is the transverse axis, bu…

greenish black color, often with a peculiar bronzelike luster (schiller) on the cleavage surface.

y at a very bright object held before the eyes, or by pressure upon certain points of the surface of the body.

Formed or crystallized at depths the earth's surface; -- said of granite, gneiss, and other rocks, whose crystallization is believed of have taken place beneath a great thickness of overlying rocks. Opposed to epigene.

Downward convexity, or convexity of the inferior surface.

A deformity of the penis, in which the urethra opens upon its under surface.