catalectic
Concise Oxford English Dictionary © 2008 Oxford University Press:
catalectic /ˌkatəˈlɛktɪk/
▶adjective Prosody denoting a metrical line of verse lacking one syllable in the last foot.
– origin C16: from late L. catalecticus, from Gk katalēktikos, from katalēgein ‘leave off’.
'catalectic' also found in these Oxford entries:

