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