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t.), that theory which regards its various phenomena as due to undulations in an ethereal medium, propagated from the radiant with immense, but measurable, velocities, and producing different impressions on the retina according to their amplitude and frequency, the sensation of brightness depending on the former, that…

A limited reciprocating motion of a particle of an elastic body or medium in alternately opposite directions from its position of equilibrium, when that equilibrium has been disturbed, as when a stretched cord or other body produces musical notes, or particles of air transmit sounds to the ear. The path of the particle…

gent or doer of the action expressed by it. -- Chest voice (Phon.), a kind of voice of a medium or low pitch and of a sonorous quality ascribed to resonance in the chest, or thorax; voice of the thick register. It is produced by vibration of the vocal cords through their entire width and thickness, and with convex sur…

isposed in circular form, attains a more or less distinct separation from the surrounding medium and has many of the properties of a solid.

a wavy manner, or by the impulse of waves, as of water or air; to bear along on a buoyant medium; as, a balloon was wafted over the channel. A gentle wafting to immortal life. Milton. Speed the soft intercourse from soul to soul, And waft a sigh from Indus to the pole. Pope.

Conveyance on a buoyant medium, as air or water. Shak. Boats prepared for waftage to and fro. Drayton.

one's self about, as in mire; to tumble and roll about; to move lazily or heavily in any medium; to flounder; as, swine wallow in the mire. I may wallow in the lily beds. Shak.

A color ground with water and gum or other glutinous medium; a color the vehicle of which is water; -- so called in distinction from oil color.

A vibration propagated from particle to particle through a body or elastic medium, as in the transmission of sound; an assemblage of vibrating molecules in all phases of a vibration, with no phase repeated; a wave of vibration; an undulation. See Undulation.

A variety of winter apple of medium size, deep red color, and yellowish flesh of a rich, rather subacid flavor.