In physics, the dyne (symbol "dyn", from Greek δύναμις (dynamis) meaning power, force) is a unit of force specified in the centimetre-gram-second (CGS) system of units, a predecessor of the modern SI. One dyne is equal to exactly 10 micronewtons. Equivalently, the dyne is defined as "the force required to accelerate a mass of one gram at a rate of one centimetre per second squared":

1 dyn = 1 g·cm/s² = 10−5 kg·m/s² = 10 µN

The dyne per centimetre is the unit usually associated with measuring surface tension. For example, the surface tension of distilled water is 72 dyn/cm at 25°C (77°F).[1]

Units of force
newton dyne kilogram-force,
kilopond
pound-force poundal
1 N  1 kg⋅m/s2 = 105 dyn  0.10197 kp  0.22481 lbF  7.2330 pdl
1 dyn = 10−5 N  1 g⋅cm/s2  1.0197×10−6 kp  2.2481×10−6 lbF  7.2330×10−5 pdl
1 kp = 9.80665 N = 980665 dyn  gn × 1 kg  2.2046 lbF  70.932 pdl
lbF  4.448222 N  444822 dyn  0.45359 kp  gn × lb  32.174 pdl
1 pdl  0.138255 N  13825 dyn  0.014098 kp  0.031081 lbF  1 lb⋅ft/s2
The value of gn (9.80665 m/s2) as used in the official definition of the kilogram-force is used here for all gravitational units.