decahedron

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decahedron

a solid figure having ten plane faces
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

decahedron

[‚dek·ə′hē·drən]
(mathematics)
A polyhedron that has 10 faces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.