Lewis & Short

1. prō-cĭdo, ĭdi, 3, v. n. [cado], to fall forwards or down, to fall flat, fall prostrate (perh. not ante-Aug.).

  1. I. In gen.: ad pedes alicujus, Hor. Epod. 17, 13: praeceps procidit ante proram, Liv. 26, 39: universi prociderunt, id. 45, 25: in corpus amici, Stat. Th. 9, 47: cum tu lassata sequendo Procidis, Ov. M. 9, 649: impulsa cupressus Euro Procidit late, Hor. C. 4, 6, 10: muri pars prociderat, Liv. 31, 46 fin.
  2. II. In partic., of a part of the body, to fall down or forwards out of its place: oculi procidunt, Cels. 6, 6, 8 fin.: oculi procidentes, Plin. 24, 13, 73, § 118: si procidant vulvae, id. 23, 6, 54, § 103: pastilli ex acaciā sistunt vulvam et sedem procidentes, id. 24, 12, 67, § 110.
    Hence, prōcĭdentĭa, ĭum, P. a., n. plur., parts of the body that fall out of their place, Plin. 23, 1, 27, § 56; 24, 11, 59, § 99.