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Octans

[ok-tanz]
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noun, genitive Oc·tan·tis [ok-tan-tis] /ɒkˈtæn tɪs/. Astronomy.
  1. the Octant, a southern constellation that contains the south celestial pole.
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Origin of Octans

< Late Latin: eighth part of a circle, equivalent to oct- oct- + -āns, as in quadrāns quadrant

octan

[ok-tuh n]
adjective
  1. (of a fever) occurring every eighth day.
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noun
  1. an octan fever.
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Origin of octan

1895–1900; < French octane, Middle French octaine, derivative of Latin octō eight, on the model of quartaine quartan
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for octans

Octans

noun Latin genitive Octantis (ɒkˈtæntɪs)
  1. a faint constellation in the S hemisphere in which the S celestial pole is situated
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

octans in Medicine

octan

(ŏktăn′)
adj.
  1. Occurring every eighth day. Used of a recurring fever.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.