A metre in which each line has a fixed number of beats but no fixed number of syllables. See isoictic metre
Groves, Peter Lewis. "Accentual (Demotic) metre". The Literary Encyclopedia. First published 04 June 2007; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5519, accessed 19 April 2015.]