from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To expand and contract rhythmically; beat.
- intransitive v. To quiver; vibrate.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To expand and contract rhythmically; to throb or to beat.
- v. To quiver, vibrate, thrill.
- v. To produce a recurring increase and decrease of some quantity.
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To throb, as a pulse; to beat, as the heart.
from The Century Dictionary and Cyclopedia
- To beat or throb, as the heart or a blood-vessel; contract and dilate in alternation or rhythmically, as the heart in systole and diastole, the disk of a jellyfish in swimming, the vacuoles in some protozoans, etc.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. expand and contract rhythmically; beat rhythmically
- v. produce or modulate (as electromagnetic waves) in the form of short bursts or pulses or cause an apparatus to produce pulses
- v. move with or as if with a regular alternating motion
Latin pulsāre, pulsāt-, frequentative of pellere, to beat; see pel-5 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin pulsātiō ("repeated striking"), from pulsō ("strike repeatedly"), from pellō ("strike") (Wiktionary)