dodecahedral

dodecahedron

[doh-dek-uh-hee-druhn, doh-dek-]
noun, plural dodecahedrons, dodecahedra [doh-dek-uh-hee-druh, doh-dek-] . Geometry, Crystallography.
a solid figure having 12 faces.

Origin:
1560–70; dodeca- + -hedron

dodecahedral, adjective
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World English Dictionary
dodecahedron (ˌdəʊdɛkəˈhiːdrən)
 
n
See also polyhedron a solid figure having twelve plane faces. A regular dodecahedron has regular pentagons as faces
 
dodeca'hedral
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

dodecahedron
1570, from Gk. dodeka "twelve" (short for duodeka, from duo "two" + deka "ten") + hedra "seat, base, chair, face of a geometric solid," from PIE base *sed- "to sit" (see sedentary).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
dodecahedron   (dō'děk-ə-hē'drən)  Pronunciation Key 
Plural dodecahedrons or dodecahedra
A polyhedron having twelve faces.
The American Heritage® Science Dictionary
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