eighth /ˈetθ, ˈeθ/
  (a.)第八的,八分之一的第八,八分之一,八日
  Eighth, n.
  1. The quotient of a unit divided by eight; one of eight equal parts; an eighth part.
  2. Mus. The interval of an octave.
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  Eighth a.
  1. Next in order after the seventh.
  2. Consisting of one of eight equal divisions of a thing.
  Eighth note Mus., the eighth part of a whole note, or semibreve; a quaver.
  eighth
       adj : coming next after the seventh and just before the ninth in
             position [syn: 8th]
       n 1: position eight in a countable series of things
       2: an eighth part [syn: one-eighth]