infallen

Verb

infall (third-person singular simple present infalls, present participle infalling, simple past infell, past participle infallen)

1. (intransitive) To fall in.
2. (intransitive) To undergo infall.
   • After this time the beam mass loss rate decreases since once the expansion wave radius is larger than the beam, material initially outside the beam starts to infall and compensate for material which is collapsing at centre of the core [...]1997, Bo Reipurth, Claude Bertout, Herbig-Haro flows and the birth of low mass stars

See all 6 meanings of infall