from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A telescope equipped to photograph the sun.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A heliograph, with a camera attached, used to photograph the Sun
from the GNU version of the Collaborative International Dictionary of English
- n. A modified kind of telescope adapted to taking photographs of the sun.
from The Century Dictionary and Cyclopedia
- n. A photographic telescope designed for making photo-graphs of the sun, particularly at a transit of Venus or at a solar eclipse. There are several forms of the instrument, differing widely in construction.
Sorry, no etymologies found.