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octan

[ok-tuh n]
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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

octan 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.