au·ra /ˈɔrə/
  氣味,氣氛
  Au·ra n.; pl. Auræ
  1. Any subtile, invisible emanation, effluvium, or exhalation from a substance, as the aroma of flowers, the odor of the blood, a supposed fertilizing emanation from the pollen of flowers, etc.
  2. Med. The peculiar sensation, as of a light vapor, or cold air, rising from the trunk or limbs towards the head, a premonitory symptom of epilepsy or hysterics.
  Electric aura, a supposed electric fluid, emanating from an electrified body, and forming a mass surrounding it, called the electric atmosphere. See Atmosphere, 2.
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  aura
       n 1: a sensation (as of a cold breeze or bright light) that
            precedes the onset of certain disorders such as a
            migraine attack or epileptic seizure
       2: an indication of radiant light drawn around the head of a
          saint [syn: aureole, halo, nimbus, glory, gloriole]
       3: a distinctive but intangible quality surrounding a person or
          thing; "an air of mystery"; "the house had a neglected
          air"; "an atmosphere of defeat pervaded the candidate's
          headquarters"; "the place had an aura of romance" [syn: air,
           atmosphere]
       [also: aurae (pl)]