Syllable Position: in ictothetic metres like iambic pentameter the line is most effectively described not as a number of syllables but as a sequence of abstract syllable-positions: normally each position is occupied by one syllable, but under certain conditions there may be two (see syncopation, elision, feminine ending) or none (see
Groves, Peter Lewis. "Syllable position". The Literary Encyclopedia. First published 04 June 2007; last revised 30 November -1.
[http://www.litencyc.com/php/stopics.php?rec=true&UID=1761, accessed 19 April 2015.]