ex·cel·si·or /ɪkˈsɛlsiɚ/
  (a.)不斷向上的,精益求精的細鉋花
  Ex·cel·si·or, a.  More lofty; still higher; ever upward.
  Ex·cel·si·or, n. A kind of stuffing for upholstered furniture, mattresses, etc., in which curled shreds of wood are substituted for curled hair.
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  excelsior
       n : thin curly wood shavings used for packing or stuffing [syn:
           wood shavings]