Dictionary

S wave

noun

Definition of S WAVE

:  a wave (as from an earthquake) in which the propagated disturbance is a shear in an elastic medium (as the earth) — compare pressure wave

Origin of S WAVE

secondary
First Known Use: 1913

S wave

noun \ˈes-ˌ\   (Medical Dictionary)

Medical Definition of S WAVE

:  the negative downward deflection in the QRS complex of an electrocardiogram that follows the R wave

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