Definition of behen:
(n) :
Behen album or white behen: a thistle native to western and central Asia, Centaurea behen
(n) :
Behen officinarum: Cucubalis behen or Oberna behen, synonyms for Silene vulgaris
(n) :
Behen rubrum or red behen: said in some sources to be Salvia haematodes (now Salvia pratensis subsp. haematodes), but in other sources to be Statice limonium, which is a synonym for Limonium vulgare.
(n) :
(obsolete) Any of various plants imported into Europe for the pharmaceutical trade in dried form, so of uncertain identity.