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1. Dictionary

   Pulse

   /pəls/

   

   noun

   • 1. a 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" Similar heartbeatpulsationpulsingthrobthrobbingvibrationpoundingthuddingthudthumpingthumpdrumming
   • ▪ each successive throb of the arteries or heart.
   • 2. a single vibration or short burst of sound, electric current, light, or other wave: "a pulse generator" Similar burstblastspurteruptionimpulsesurgeinformal:splurt
   • ▪ a musical beat or other regular rhythm. Similar rhythmbeatrhythmical flow/patternmeasuremetertempocadence
   • 3. the 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. a measured amount of an isotopic label given to a culture of cells.

   verb

   • 1. throb rhythmically; pulsate: "a knot of muscles at the side of his jaw pulsed"
   • ▪ modulate (a wave or beam) so that it becomes a series of pulses.
   • ▪ apply a pulsed signal to (a device).
   • ▪ short for pulse-label

   Word Origin late Middle English: from Latin pulsus ‘beating’, from pellere ‘to drive, beat’.

   Derivatives

   • 1. pulseless adjective
   • 2. pulser noun

   Scrabble Points: 7

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2. en.wikipedia.org › wiki › PhotonPhoton - Wikipedia

   en.wikipedia.org › wiki › Photon

   • Cached

   21 hours ago · A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force.

   • Mean lifetime: Stable
   • Electric charge: 0, < 1×10−35 e

   • Symbol: γ
   • Mass: 0 (theoretical value), < 1×10−18 eV/c² (experimental limit)