Volume — Vol ume, n. [F., from L. volumen a roll of writing, a book, volume, from volvere, volutum, to roll. See {Voluble}.] 1. A roll; a scroll; a written document rolled up for keeping or for use, after the manner of the ancients. [Obs.] [1913 Webster]… … The Collaborative International Dictionary of English
Gravity — Grav i*ty, n.; pl. {Gravities}. [L. gravitas, fr. gravis heavy; cf. F. gravit[ e]. See {Grave}, a., {Grief}.] 1. The state of having weight; beaviness; as, the gravity of lead. [1913 Webster] 2. Sobriety of character or demeanor. Men of gravity… … The Collaborative International Dictionary of English
Gravity battery — Gravity Grav i*ty, n.; pl. {Gravities}. [L. gravitas, fr. gravis heavy; cf. F. gravit[ e]. See {Grave}, a., {Grief}.] 1. The state of having weight; beaviness; as, the gravity of lead. [1913 Webster] 2. Sobriety of character or demeanor. Men of… … The Collaborative International Dictionary of English
Gravity darkening — Gravity darkening, also referred to as Gravity Brightening, is an astronomical phenomenon where a star rotates so rapidly that it has a detectibly oblate shape, such as in Regulus in the Leo constellation.When a star is oblate, it has a larger… … Wikipedia
Gravity turn — A gravity turn or zero lift turn is a maneuver (see trajectory optimization) used in launching a spacecraft into, or descending from, an orbit around a celestial body such as a planet or a moon. This launch trajectory offers two main advantages… … Wikipedia
Gravity knife — A gravity knife is a knife which opens by the forces of inertia or gravity.cite book | last = Langston | first = Richard | title = Collector s Guide to Switchblade Knives: An Illustrated Historical and Price Reference | publisher = Paladin Press… … Wikipedia
Gravity (alcoholic beverage) — A floating hydrometer in use to test the specific gravity of beer Gravity, in the context of fermenting alcoholic beverages, refers to the specific gravity, or relative density compared to water, of the wort or must at various stages in the… … Wikipedia
Gravity bong — Waterfall method= Similar in design to the bucket method is the fountain method, also known as a waterfall bong or flood (southern US colloquialism). A Fountain usually consists of a plastic bottle with a hole punched at the bottom and a… … Wikipedia
Gravity Gun (Half-Life) — For other fictional devices called gravity guns , see Gravity gun. The Zero Point Energy Field Manipulator, or gravity gun is a fictional weapon from the video game Half Life 2 . The weapon is given to Gordon Freeman by Alyx Vance in the Black… … Wikipedia
Gravity current — In fluid dynamics, a gravity current is a primarily horizontal flow in a gravitational field that is driven by a density difference, hence gravity currents also sometimes being referred to as density currents . Typically, the density difference… … Wikipedia
Volume operator — A quantum field theory of General Relativity provides operators that measure the geometry of space time. The volume operator V(R) of a region R is defined as the operator that yields the expectation value of a volume measurement of the region R,… … Wikipedia