from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A catopter, or reflecting glass.
from the GNU version of the Collaborative International Dictionary of English
- n. See catopter.
from The Century Dictionary and Cyclopedia
- n. Same as catopter.
Sorry, no etymologies found.
He supposes the catoptron to have been the same with the astrolabe.
"Moschopalus," he says, "an ancient grammarian, mentions four instruments with which the astronomers of antiquity were accustomed to observe the stars -- the catoptron, the dioptron, the eisoptron and the enoptron."