Lewis & Short

succĭdŭus, a, um, adj. [1. succido], sinking down, sinking, failing (poet.).

  1. I. Lit.: genu, Ov. H. 13, 24: poples, id. M. 10, 458: gradus, Stat. Th. 4, 661: flammae, id. ib. 10, 116 et saep.
  2. II. Trop.: benedictio, faltering, trembling, Sid. Ep. 7, 6 fin.
  3. III. = succidaneus (late Lat.), Ven. Misc. 4, 25, 10.