The Collaborative International Dictionary of English v.0.48:
Appellant \Ap*pel"lant\, a. [L. appellans, p. pr. of appellare; cf. F. appelant. See Appeal.] Relating to an appeal; appellate. "An appellant jurisdiction." --Hallam. [1913 Webster] Party appellant (Law), the party who appeals; appellant; -- opposed to respondent, or appellee. --Tomlins. [1913 Webster]