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First opening or expansion; first appearance; beginning; rise. "The dawn of time." Thomson. These tender circumstances diffuse a dawn of serenity over the soul. Pope.

inaria saccharina, and L. longicruris) of the Atlantic ocean, having a blackish, leathery expansion, shaped somewhat like an apron. -- Devil's coachhorse. (Zoöl.) (a) The black rove beetle (Ocypus olens). [Eng.] (b) A large, predacious, hemipterous insect (Prionotus cristatus); the wheel bug. [U.S.] -- Devil's darning…

The rhythmical expansion or dilatation of the heart and arteries; -- correlative to systole, or contraction.

Of or pertaining to the second expansion of the artery in the dicrotic pulse; as, the dicrotic wave.

exposed, by the change of position of the colored fluid, in consequence of the different expansions of the air in the bulbs. A graduated scale is attached to one leg of the tube. -- Differential windlass, or Chinese windlass, a windlass whose barrel has two parts of different diameters. The hoisting rope winds upon o…

The quality or state of being diffusive or diffuse; extensiveness; expansion; dispersion. Especially of style: Diffuseness; want of conciseness; prolixity. The fault that I find with a modern legend, it its diffusiveness. Addison.

The quality of being dilatable, or admitting expansion; -- opposed to contractibility. Ray.

Capable of expansion; that may be dilated; -- opposed to contractible; as, the lungs are dilatable by the force of air; air is dilatable by heat.

The act of dilating; expansion; an enlarging on al

The act of dilating, or the state of being dilated; expansion; dilatation. Mrs. Browning. At first her eye with slow dilation rolled. Tennyson. A gigantic dilation of the hateful figure. Dickens.

An instrument for measuring the dilatation or expansion of a substance, especially of a fluid.

or bulk, real or apparent; the state of being increased; augmentation; further extension; expansion.

To state in enlarged form; to develop; as, to expand an equation. See Expansion, 5.

Anything which causes expansion esp. (Mech.) a tool for stretching open or expanding a tube, etc.

stretching out; enlargement in breadth or continuation of length; increase; augmentation; expansion.

ch is afterward relieved suddenly by letting a lid at the muzzle fly open, when the rapid expansion separates the fibers. -- Fiber plants (Bot.), plants capable of yielding fiber useful in the arts, as hemp, flax, ramie, agave, etc.

Frond bearing; resembling a frond; having a simple expansion not separable into stem and leaves.

r expressing the temperature in degrees of the air thermometer, reckoned from its zero of expansion. -- Circular functions. See Inverse trigonometrical functions (below). -- Continuous function, a quantity that has no interruption in the continuity of its real values, as the variable changes between any specified lim…

ar. -- Core gear, a mortise gear, or its skeleton. See Mortise wheel, under Mortise. -- Expansion gear (Steam Engine), the arrangement of parts for cutting off steam at a certain part of the stroke, so as to leave it to act upon the piston expansively; the cut-off. See under Expansion. -- Feed gear. See Feed motion,…

for making ice artificially, as by the production of a low temperature through the sudden expansion of a gas or vapor, or the rapid evaporation of a volatile liquid. -- Ice master. See Ice pilot (below). -- Ice pack, an irregular mass of broken and drifting ice. -- Ice paper, a transparent film of gelatin for copyin…