Quad'ri-dĕç'i-mal, a.
a. [Fr. quadridécimal, from Lat. quatuor, four, and decem, ten.] (Crystallog.) Having four faces on the prism, or the middle part, and two summits, containing together ten faces;— said of certain crystals.
a. [Fr. quadridécimal, from Lat. quatuor, four, and decem, ten.] (Crystallog.) Having four faces on the prism, or the middle part, and two summits, containing together ten faces;— said of certain crystals.