Webster's Revised Unabridged Dictionary · 1913

Iambic

Iambic , adjective

[Latin iambicus, Greek {not transcribed}: compare French iambique.]

1.
(Prosody) Consisting of a short syllable followed by a long one, or of an unaccented syllable followed by an accented; as, an iambic foot.
2.
Pertaining to, or composed of, iambics; as, an iambic verse; iambic meter. See Lambus .

Iambic , noun

1.
(a) (Prosody) An iambic foot; an iambus.
(b)
(Prosody) A verse composed of iambic feet.
Thy gen- | ius calls | thee not | to pur- | chase fame In keen | iam- | bics, but | mild an- | agram. — Dryden

The following couplet consists of iambic verses.

2.
A satirical poem (such poems having been anciently written in iambic verse); a satire; a lampoon.