\Cross"bill`\ (-b[i^]l`). (Law)
A bill brought by a defendant, in an equity or chancery suit,
against the plaintiff, respecting the matter in question in
that suit. --Bouvier.
Note: In criminal practice, cross bills of indictment for
      assault, in which the prosecutor in once case is the
      defendant in another, may be tried together.

\Cross"bill`\, n. (Zo["o]l.)
A bird of the genus {Loxia}, allied to the finches. Their
mandibles are strongly curved and cross each other; the
crossbeak.