The Collaborative International Dictionary of English v.0.48:

Heroicomic \He`ro*i*com"ic\, Heroicomical \He`ro*i*com"ic*al\,
   a. [Cf. F. h['e]ro["i]comigue. See Heroic, and Comic.]
   Combining the heroic and the ludicrous; denoting high
   burlesque; as, a heroicomic poem.
   [1913 Webster]