What is "maiden plum"

Maiden \Maid"en\, a.

1. Of or pertaining to a maiden, or to maidens; suitable to, or characteristic of, a virgin; as, maiden innocence. ``Amid the maiden throng.''
   --Addison.

   Have you no modesty, no maiden shame ?
   --Shak.

2. Never having been married; not having had sexual intercourse; virgin; -- said usually of the woman, but sometimes of the man; as, a maiden aunt. ``A surprising old maiden lady.''
   --Thackeray.

3. Fresh; innocent; unpolluted; pure; hitherto unused. ``Maiden flowers.''
   --Shak.

   Full bravely hast thou fleshed Thy maiden sword.
   --Shak.

4. Used of a fortress, signifying that it has never been captured, or violated. -- T. Warton. Macaulay.

   Maiden assize (Eng. Law), an assize which there is no criminal prosecution; an assize which is unpolluted with blood. It was usual, at such an assize, for the sheriff to present the judge with a pair of white gloves.
   --Smart.

   Maiden name, the surname of a woman before her marriage.

   Maiden pink. (Bot.) See under Pink.

   Maiden plum (Bot.), a West Indian tree ( Comocladia integrifolia) with purplish drupes. The sap of the tree is glutinous, and gives a persistent black stain.

   Maiden speech, the first speech made by a person, esp. by a new member in a public body.

   Maiden tower, the tower most capable of resisting an enemy.

   maiden voyage the first regular service voyage of a ship.

n. A West Indian tree, ''Comocladia integrifolia'', with purplish drupes. The sap of the tree is glutinous, and gives a persistent black stain.