eridanus

noun, genitive E·rid·a·ni [ih-rid-n-ahy] /ɪˈrɪd nˌaɪ/. Astronomy.

1. the River, a large southern constellation between Cetus and Orion, containing the bright star Achernar.

noun Latin genitive Eridani (ɛˈrɪdəˌnaɪ)

1. a long twisting constellation in the S hemisphere extending from Orion to Hydrus and containing the first magnitude star Achernar