Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A centimeter-gram-second unit of force, equal to the force required to impart an acceleration of one centimeter per second per second to a mass of one gram.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A unit of force in the CGS system that is equal to the force which generates a velocity of one centimeter per second acting on one gram for one second. Symbol: dyn.

from the GNU version of the Collaborative International Dictionary of English

  • n. The unit of force, in the C. G. S. (Centimeter Gram Second) system of physical units; that is, the force which, acting on a gram for a second, generates a velocity of a centimeter per second.

from The Century Dictionary and Cyclopedia

  • n. In physics, the unit of force in the centimeter-gram-second system, being that force which, acting on a gram for one second, generates a velocity of a centimeter per second; the product of a gram into a centimeter, divided by the square of a mean solar second.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a unit of force equal to the force that imparts an acceleration of 1 cm/sec/sec to a mass of 1 gram

Etymologies

From Greek dunamis, power; see dynamic.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From the French dyne, from the Ancient Greek δῠ́νᾰμῐς (dunamis, "force"). (Wiktionary)

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