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Illusory sight on Mars Crossword Clue

5 letters · New York Times · Sunday, November 9, 2014 · 16-Down

Appeared in 1 New York Times Crossword: Sunday, November 9, 2014.

Exact puzzle match · New York Times · November 9, 2014 · 16-Down · 5 letters

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(astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion

noun

WordNet® (Princeton University)

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