Definition of Piscis Austrinus
: a southern constellation that is visible south of the constellation Aquarius and that is represented by the figure of a fish Start by aiming your finder scope toward the 3rd-magnitude star Delta Aquarii. Extend a line south to Fomalhaut, the 1st-magnitude star in the constellation Piscis Austrinus … — David Higgins, Astronomy, October 1991
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First Known Use of piscis austrinus
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