sēmĭ-pēs — Lewis & Short
sēmĭ-pēs, pĕdis, m.
I A half-foot, half a foot.
1 As a measure of length, Cato, R. R. 123; Varr. R. R. 3, 5, 15:
latum semipede,Vitr. 2, 3:
minimi semipedum mensura,Plin. 9, 5, 4, § 11:
non altiores quino semipede,id. 17, 11, 16, § 80:
intervallo duum pedum et semipedis,id. 17, 20, 33, § 144.—
2 A half-foot in verse, Varr. ap. Gell. 18, 15, 2; Aus. Ep. 4, 86; Aug. de Musica, 5, 11.—
II Half-lame: crure trunco semipes, Prud. ste*f. 2, 150.