Iambus

• (n.) A foot consisting of a short syllable followed by a long one, as in /mans, or of an unaccented syllable followed by an accented one, as invent; an iambic. See the Couplet under Iambic, n.
Found on http://thinkexist.com/dictionary/meaning/iambus/

Iambus

I·am'bus noun ; plural Latin Iambi , English Iambuses . [ Latin iambus , Greek ...; probably akin to ... to throw, assail (the iambus being first used in satiric poetry), and to Latin jacere to throw. Confer Jet a shooting forth.] (Pros.) A foot consi...
Found on http://www.encyclo.co.uk/webster/I/1

Iambus

Another term for an iamb. See above.
Found on http://www.encyclo.co.uk/local/22385

Iambus

In in prosody, an iambus is a foot of two syllables, a short and a long one or an unaccented syllable followed by an accented one. The iambic metre is the fundamental rhythm of many English verses. The verse of five iambic feet is a favourite metre, being the heroic verse of English, German, and Italian poetry.
Found on http://www.probertencyclopaedia.com/browse/AI.HTM

iambus

poetic foot consisting of short then a long syllable
Found on http://phrontistery.info/i.html
No exact match found