What's the difference between defloration and devirgination?

Defloration

Definition:

(n.) The act of deflouring; as, the defloration of a virgin.
(n.) That which is chosen as the flower or choicest part; careful culling or selection.

Example Sentences:

(1) Frequency and character of the bleeding during defloration, experienced pain, a complex of fear due to pain and bleeding, motivation, evaluation and self-esteem of the behaviour, self-esteem on timeliness of the first sexual act, the attitude of the husband to defloration performed by other partner before marriage.
(2) It was established that defloration occurred not at exactly determined moment of the age of young women and girls, but at wider age interval from 16 to 20 years, during noon hours and at night, with equal probability during all seasons, excluding summer, when probability is twice as large, in various places: lodgings, in another's flats, during trips or youth brigades, duration of sexual prey is described, usage of alcohol, ect.
(3) The conclusion is that the screening of the uterine cervix should start already at the time of defloration.
(4) These structures postpone the onset of sexual desires to the time after the defloration.
(5) An attempt is made to characterize the first partner and stability of the connection between partners, evolution of this connection, which is the background of defloration.