Medical Dictionary


noun \ˈspin\

Medical Definition of SPIN

:  a quantum characteristic of an elementary particle that is visualized as the rotation of the particle on its axis and that is responsible for measurable angular momentum and magnetic moment
:  the angular momentum which is associated with spin, whose magnitude is quantized, and which may assume either of two possible directions; also :  the angular momentum of a system of elementary particles derived from their spins and orbital motions—see spin echo, spin label
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