spen·cer /ˈspɛn(t)sɚ/
  緊身的短上衣,前桅,大縱帆
  Spen·cer n.  One who has the care of the spence, or buttery. [Obs.]
  Spen·cer, n.  A short jacket worn by men and by women.
  Spen·cer, n. Naut. A fore-and-aft sail, abaft the foremast or the mainmast, hoisted upon a small supplementary mast and set with a gaff and no boom; a trysail carried at the foremast or mainmast; -- named after its inventor, Knight Spencer, of England [1802].
  Spencer mast, a small mast just abaft the foremast or mainmast, for hoisting the spencer. --R. H. Dana, Jr.
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  Spencer
       n : English philosopher and sociologist who applied the theory
           of natural selection to human societies (1820-1903) [syn:
            Herbert Spencer]