Definition of Tucana
astronomy
: a southern constellation that is visible between the constellations of Hydrus and Grus and that is represented by the figure of a toucan Over a similar 10-day period last month, the Hubble telescope operated by the National Aeronautics and Space Administration was focused on a narrow region in the constellation Tucana, near the south celestial pole. — John Noble Wilford, New York Times, 24 Nov. 1998
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First Known Use of tucana
1802
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