I.a measure; in partic., a poetical measure, metre; a verse (post-Aug.): “rhythmi, id est numeri, spatio temporum constant: metra etiam ordine: ideoque alterum esse quantitatis videtur, alterum qualitatis,” Quint. 9, 4, 46: “metri necessitate cogi,” id. 8, 6, 17; 1, 6, 2: “metri causā,” Gell. 4, 17, 9: “Tibulli,” i. e. elegiac metre, Mart. 4, 6, 4: “exceptis metris Vergilii,” i. e. verses, Col. 3, 10, 20 dub.
mē^trum , i, n., = μέτρον,