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Demure :: Demure (a.) Affectedly modest, decorous, or serious; making a show of gravity..

Brachystochrone :: Brachystochrone (n.) A curve, in which a body, starting from a given point, and descending solely by the force of gravity, will reach another given point in a shorter time than it could by any other path. This curve of quickest descent, as it is sometimes called, is, in a vacuum, the same as the cycloid..

Ruthenium :: Ruthenium (n.) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum..

Ponderance :: Ponderance (n.) Weight; gravity.

Magnesium :: Magnesium (n.) A light silver-white metallic element, malleable and ductile, quite permanent in dry air but tarnishing in moist air. It burns, forming (the oxide) magnesia, with the production of a blinding light (the so-called magnesium light) which is used in signaling, in pyrotechny, or in photography where a strong actinic illuminant is required. Its compounds occur abundantly, as in dolomite, talc, meerschaum, etc. Symbol Mg. Atomic weight, 24.4. Specific gravity, 1.75..

Fall :: Fall (v. t.) To Descend, either suddenly or gradually; particularly, to descend by the force of gravity; to drop; to sink; as, the apple falls; the tide falls; the mercury falls in the barometer..

Galactometer :: Galactometer (n.) An instrument for ascertaining the quality of milk (i.e., its richness in cream) by determining its specific gravity; a lactometer..

Poluria :: Poluria (n.) A persistently excessive flow of watery urine, with low specific gravity and without the presence of either albumin or sugar. It is generally accompanied with more or less thirst..

Osmium :: Osmium (n.) A rare metallic element of the platinum group, found native as an alloy in platinum ore, and in iridosmine. It is a hard, infusible, bluish or grayish white metal, and the heaviest substance known. Its tetroxide is used in histological experiments to stain tissues. Symbol Os. Atomic weight 191.1. Specific gravity 22.477..

Pycnometer :: Pycnometer (n.) A specific gravity bottle; a standard flask for measuring and comparing the densities of liquids.

Areometry :: Areometry (n.) The art or process of measuring the specific gravity of fluids.

Liveliness :: Liveliness (n.) The quality or state of being lively or animated; sprightliness; vivacity; animation; spirit; as, the liveliness of youth, contrasted with the gravity of age..

Opal :: Opal (n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity..

Microlite :: Microlite (n.) A rare mineral of resinous luster and high specific gravity. It is a tantalate of calcium, and occurs in octahedral crystals usually very minute..

Lactometer :: Lactometer (n.) An instrument for estimating the purity or richness of milk, as a measuring glass, a specific gravity bulb, or other apparatus..

Ripple :: Ripple (n.) a small wave on the surface of water or other liquids for which the driving force is not gravity, but surface tension..

Foot Pound :: Foot pound () A unit of energy, or work, being equal to the work done in raising one pound avoirdupois against the force of gravity the height of one foot..

Aluminium :: Aluminium (n.) The metallic base of alumina. This metal is white, but with a bluish tinge, and is remarkable for its resistance to oxidation, and for its lightness, having a specific gravity of about 2.6. Atomic weight 27.08. Symbol Al..

Gravity :: Gravity (a.) Lowness of tone; -- opposed to acuteness.

Tautochrone :: Tautochrone (n.) A curved line, such that a heavy body, descending along it by the action of gravity, will always arrive at the lowest point in the same time, wherever in the curve it may begin to fall; as, an inverted cycloid with its base horizontal is a tautochrone..

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