coronagraph: Meaning and Definition of

co•ro•na•graph

Pronunciation: (ku-rō'nu-graf", -gräf"), [key]
— n. Astron.
  1. an instrument for observing and photographing the sun's corona, consisting of a telescope fitted with lenses, filters, and diaphragms that simulate an eclipse.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.