from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A line of verse consisting of three metrical feet.
- n. A line of verse consisting of three measures of two feet each, especially one in iambic, trochaic, or anapestic meter in classical prosody.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A line in a poem having three metrical feet.
- n. a poetic metre in which each line has three feet.
from the GNU version of the Collaborative International Dictionary of English
- adj. Consisting of three poetical measures.
from The Century Dictionary and Cyclopedia
- In prosody, consisting of three measures, especially of three iambic measures.
- n. In prosody, a verse or period consisting of three measures.
Late Latin, from Latin trimetrus, from Greek trimetros : tri-, tri- + metron, measure; see meter1.(American Heritage® Dictionary of the English Language, Fourth Edition)