defects is a form of:

Velocity



noun — Plural: Velocities
1.
(Rate of motion swiftness, speed distance traversed in unit time in a given direction) ល្បឿន, ភាពរហ័ស
Example: The velocity of the wind, the velocity of a rocket; the velocity of light.
2.
(បច្ចេកទេស) ល្បឿន
ENGLISH MEANING
noun — Plural: Velocities
1.
Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light.
2.
Rate of motion; the relation of motion to time, measured by the number of units of space passed over by a moving body or point in a unit of time, usually the number of feet passed over in a second.