The Collaborative International Dictionary
Transfugitive
Transfuge \Trans"fuge\, Transfugitive \Trans*fu"gi*tive\, n. [L. transfuga; trans across, over + fugere to flee.] One who flees from one side to another; hence, a deserter; a turncoat; an apostate. [R.]
Wiktionary
transfugitive
n. A transfuge.