Regalian
The term Regalian may refer to:

 Regalian phaser rifle, a weapon type in possession of the Acamarian Gatherers
 Regalian law, a form of law Picard required brushing up on
 Regalian fleaspider, an import made to DS9 by Quark
 Regalian liquid crystal, an illegal import made to DS9 by Quark