Poetic line

• Verse form
• Verse of three feet
• Kind of verse
• Line of three feet

Wiktionary Word definitions in Wiktionary
alt. 1 A line in a poem having three metrical feet. 2 a poetic metre in which each line has three feet. n. 1 A line in a poem having three metrical feet. 2 a poetic metre in which each line has three feet.

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"a verse of three metrical feet," 1560s, from Latin trimetrus , from Greek trimetros "having three measures," from tri- "three" (see tri- ) + metron "a measure" (see meter (n.2)). Related: Trimetrical .

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Trimeter \Trim"e*ter\, a. [L. trimetrus, Gr. ?; ? (see Tri- ) + ? measure. See Meter measure.] (Pros.) Consisting of three poetical measures. -- n. A poetical division of verse, consisting of three measures. --Lowth.

Wikipedia Word definitions in Wikipedia
In poetry , a trimeter (Greek for "three measure") is a metre of three metrical feet per line. Examples: When here // the spring // we see, Fresh green // upon // the tree.