adjective, Physiology.
rhythmically contracting.
of the nature of contraction.
characterized by alternate contraction and dilation, as the action of the heart.
(esp of the action of the heart) of, relating to, or characterized by alternate contractions and dilations; pulsating

systaltic sys·tal·tic (sĭ-stôl’tĭk, -stāl’-)
Alternately contracting and dilating, as the heart; pulsating.


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