Lewis & Short

multĭpĕda, ae, f. [multus-pes],

  1. I. a multipede, an insect, Plin. 22, 25, 58, § 122; 29, 6, 39, § 143; v. millepeda.
  2. II. A measure a number of feet long, Gram. Vet. p. 190, 6.