The Collaborative International Dictionary of English v.0.48:

Negatively \Neg"a*tive*ly\, adv.
   1. In a negative manner; with or by denial. "He answered
      negatively." --Boyle.
      [1913 Webster]

   2. In the form of speech implying the absence of something;
      -- opposed to positively.
      [1913 Webster]

            I shall show what this image of God in man is,
            negatively, by showing wherein it does not consist,
            and positively, by showing wherein it does consist.
                                                  --South.
      [1913 Webster]

   Negatively charged or Negatively electrified (Elec.),
      having a charge of the kind of electricity called
      negative, as does the electron.
      [1913 Webster] Negativeness

WordNet (r) 3.0 (2006):

negatively charged
    adj 1: having a negative charge; "electrons are negative" [syn:
           negative, electronegative, negatively charged]