The Collaborative International Dictionary
Brachycatalectic
Brachycatalectic \Brach`y*cat`a*lec"tic\, n. [Gr. ?; brachy`s short + ? to leave off; cf. ? incomplete.] (Gr. & Last. Pros.) A verse wanting two syllables at its termination.
Wiktionary
brachycatalectic
n. (context poetry English) A verse that is two syllables short.