old·ster /ˈol(d)stɚ/
  老人
  Old·ster n.  An old person. [Jocular]
  2. Zool. A tropical Atlantic fish (Bessy cerca). [wns=1]
  Syn: -- queen triggerfish, Bessy cerca, oldwench, Balistes vetula.
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  oldster
       n : an elderly person [syn: old person, senior citizen, golden
           ager]