octans

noun, genitive Oc·tan·tis [ok-tan-tis] /ɒkˈtæn tɪs/. Astronomy.

1. the Octant, a southern constellation that contains the south celestial pole.

adjective

1. (of a fever) occurring every eighth day.

noun

2. an octan fever.

noun Latin genitive Octantis (ɒkˈtæntɪs)

1. a faint constellation in the S hemisphere in which the S celestial pole is situated

adj.

1. Occurring every eighth day. Used of a recurring fever.