pentameter
pen.tam.e.ter \pen-'tam-*t-*r\ n [L, fr. Gk pentametros having five metrical feet, fr. penta- + m]etron measure - more at MEASURE : a verse consisting of five feet
 Webster's English Dictionary
 Webster's English Dictionarypen.tam.e.ter \pen-'tam-*t-*r\ n [L, fr. Gk pentametros having five metrical feet, fr. penta- + m]etron measure - more at MEASURE : a verse consisting of five feet