the.com/pulsation
The universe's way of saying everything alive has a heartbeat, even light.
means A rhythmic throbbing or beating — one regular surge in a repeating pattern of expansion and contraction.
from From Latin 'pulsare,' meaning 'to beat or strike repeatedly,' itself an intensive form of 'pellere,' 'to drive or push.' That same root gave English 'pulse,' 'propel,' and 'compel' — all words about forceful, repeated driving. The physician's fingers on your wrist and the astronomer's flickering star are, etymologically, both just things that keep getting struck.
- origin
- from Latin pulsare, to keep striking
- stars do it
- Cepheid variables pulsate on a precise clock
- medical tell
- an unexplained pulsation often means a vessel is misbehaving
- not vibration
- pulsation is rhythmic swelling, not mere shaking