pris·mat·ic / prizˈmatik/ • adj. of, relating to, or having the form of a prism or prisms: a prismatic structure. ∎  (of colors) formed, separated, or distributed by an optical prism or something acting as one: a flash of prismatic light on the edge of the glass. ∎  (of colors) varied and brilliant: a hundred prismatic tints. ∎  (of an instrument) incorporating a prism or prisms: a prismatic compass.DERIVATIVES: pris·mat·i·cal·ly / -ik(ə)lē/ adv.

prismatic Applied to elongate minerals which have well-developed crystal faces parallel to the prism.