Examples
“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.”
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oroboros A word, when written in uppercase, appears the same when reflected in a mirror: e.g., TOOT. May 22, 2008