How to sign: the rhythmic contraction and expansion of the arteries with each beat of the heart
"he could feel the beat of her heart";
Similiar / Same: pulse, beat, pulsation
Categories: periodic event, recurrent event
Within this category: diastole, systole, throb
How to sign: a very short time (as the time it takes the eye blink or the heart to beat)
"if I had the chance I'd do it in a flash";
Similiar / Same: blink of an eye, instant, jiffy, split second, trice, twinkling, wink, New York minute, flash