pulse1

noun

• 1a rhythmical throbbing of the arteries as blood is propelled through them, typically as felt in the wrists or neck:the doctor found a faint pulse the idea was enough to set my pulse racing
• each successive throb of the arteries or heart.

• 2a single vibration or short burst of sound, electric current, light, or other wave:a pulse of gamma rays [as modifier]:a pulse generator
• a musical beat or other regular rhythm.

• 3the central point of energy and organization in an area or activity:those close to the financial and economic pulse maintain that there have been fundamental changes

• 4 Biochemistry a measured amount of an isotopic label given to a culture of cells.

verb

• 1 [no object] throb rhythmically; pulsate:a knot of muscles at the side of his jaw pulsed

• 2 [with object] modulate (a wave or beam) so that it becomes a series of pulses: the current was pulsed (as adjective pulsed)pulsed outputs
• apply a pulsed signal to (a device): a loudspeaker pulsed by a capacitor discharge
• Biochemistryshort for pulse-label.