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Verb: infall  'in,fol
  1. (physics and astronomy) move towards a massive body due to gravitational attraction
    "The gas clouds began to infall towards the newly formed star"
Noun: infall  'in,fol
  1. (physics and astronomy) movement towards a massive body due to gravitational attraction
    "The astronomers observed the infall of matter into the black hole"

Derived forms: infalls, infalling