Definitions for iambusaɪˈæm bəs
Random House Webster's College Dictionary
i•am•busaɪˈæm bəs(n.)(pl.)-bi; -bus•es.
Category: Literature, Prosody
Origin of iambus:
1580–90; < L < Gk íambos
a metrical unit with unstressed-stressed syllables
Origin: From Greek ἴαμβος "a poetic meter".
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
The Nuttall Encyclopedia
a metrical foot, consisting of two syllables, of which the first is short and the second long, or in which the stress is on the second.