What is "procidentia"

Procidence \Proc"i*dence\, Procidentia \Proc*i*den"ti*a\,, n. [L. procidentia, fr. procidens, p. pr. of procidere to fall down forward.] (Med.) A falling down; a prolapsus. [R.]
--Parr.

Procidentia is a medical term which has a similar meaning to prolapse, the falling down of an organ from its normal anatomical position. It normally refers to uterine prolapse, but it may also refer to rectal prolapse. From the Latin procidere - to fall forward.

N.B. Some gynecologists use the term procidentia to refer to the 3rd degree of uterine prolapse only.