The Collaborative International Dictionary of English v.0.48:

Electro-positive \E*lec`tro-pos"i*tive\, a.
   1. (Physics) Of such a nature relatively to some other
      associated body or bodies, as to tend to the negative pole
      of a voltaic battery, in electrolysis, while the
      associated body tends to the positive pole; -- the
      converse or correlative of electro-negative.
      [1913 Webster]

   Note: An element that is electro-positive in one compound may
         be electro-negative in another, and vice versa.
         [1913 Webster]

   2. (Chem.) Hence: Positive; metallic; basic; -- distinguished
      from negative, nonmetallic, or acid.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Electro-positive \E*lec`tro-pos"i*tive\, n. (Chem. & Physics)
   A body which passes to the negative pole in electrolysis.
   Electro-puncturation

WordNet (r) 3.0 (2006):

electropositive
    adj 1: having a positive charge; "protons are positive" [syn:
           positive, electropositive, positively charged]