The Collaborative International Dictionary of English v.0.48:

Helpmeet \Help"meet`\, n. [See Helpmate.]
   A wife; a helpmate.
   [1913 Webster]

         The Lord God created Adam, . . . and afterwards, on his
         finding the want of a helpmeet, caused him to sleep,
         and took one of his ribs and thence made woman. --J. H.
                                                  Newman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

helpmeet
    n 1: a helpful partner [syn: helpmate, helpmeet]