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Definition of Bipyramidal
1. a. Consisting of two pyramids placed base to base; having a pyramid at each of the extremities of a prism, as in quartz crystals.
Definition of Bipyramidal
1. [adj]
Medical Definition of Bipyramidal
1. Consisting of two pyramids placed base to base; having a pyramid at each of the extremities of a prism, as in quartz crystals. Origin: Pref. Bi- + pyramidal. Source: Websters Dictionary (01 Mar 1998)