Definitions
from The American Heritage® Dictionary of the English Language, 4th Edition
 n. A centimetergramsecond 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/ShareAlike 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 centimetergramsecond 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
Examples

The word dyne comes from the Greek dynamis, power.

Cyberdyne is from The Terminator — made the killer robots

A dyne is the unit of force in the centimetergramsecond system of measurement.

Anything “ dyne” always makes me think of THE CRYING OF LOT 49, which scares me much more than Skynet.
All You Need is…HAL? « Haikasoru: Space Opera. Dark Fantasy. Hard Science.

PJ Evans @273  that would be an erg. a dynecentimeter

The erg is equal to the work done by a force of one dyne acting through a distance of one centimeter.

Conversions from/to Joule kilowatthour electronvolt calorie Btu horsepower hour footpound dyne  centimeter therm

One dyne is the force that accelerates a mass of one gram at the rate of one centimeter per second per second.

Expressed in SI units, the dyne equals 105 Newton.

It used to be a branch of dyne:bolic but it was like 2 years ago.
Puredyne Turns Any Computer Into A Multimedia Powerhouse  Lifehacker Australia
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