Meaning of astrobleme

as•tro•bleme

Pronunciation: (as'tru-blēm"), [key]
— n. Geol.
  1. an erosional scar on the earth's surface, produced by the impact of a cosmic body, as a meteorite or asteroid. Cf. crater (def. 2).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.