terminal velocity

ter′minal veloc′ity,

[Physics.]
- Physicsthe velocity at which a falling body moves through a medium, as air, when the force of resistance of the medium is equal in magnitude and opposite in direction to the force of gravity.
- Physicsthe maximum velocity of a body falling through a viscous fluid.
Rocketry
- the greatest speed that a rocket, missile, etc., attains after burnout or after leaving the barrel of a gun.
- the speed of a missile or projectile on impact with its target.

Collins Concise English Dictionary © HarperCollins Publishers::

terminal velocity n

the constant maximum velocity reached by a body falling under gravity through a fluid, esp the atmosphere
the velocity of a missile or projectile when it reaches its target
the maximum velocity attained by a rocket, missile, or shell flying in a parabolic flight path
the maximum velocity that an aircraft can attain, as determined by its total drag

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