Chill and fever

Chill \Chill\ (ch[i^]l), n. [AS. cele, cyle, from the same root
   as celan, calan, to be cold; akin to D. kil cold, coldness,
   Sw. kyla to chill, and E. cool. See {Cold}, and cf. {Cool}.]
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   1. A moderate but disagreeable degree of cold; a disagreeable
      sensation of coolness, accompanied with shivering. "[A]
      wintry chill." --W. Irving.
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   2. (Med.) A sensation of cold with convulsive shaking of the
      body, pinched face, pale skin, and blue lips, caused by
      undue cooling of the body or by nervous excitement, or
      forming the precursor of some constitutional disturbance,
      as of a fever.
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   3. A check to enthusiasm or warmth of feeling;
      discouragement; as, a chill comes over an assembly.
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   4. An iron mold or portion of a mold, serving to cool
      rapidly, and so to harden, the surface of molten iron
      brought in contact with it. --Raymond.
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   5. The hardened part of a casting, as the tread of a car
      wheel. --Knight.
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   {Chill and fever}, fever and ague.
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