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The Collaborative International Dictionary
Icosahedral

Icosahedral \I`co*sa*he"dral\, a. [See Icosahedron.] (Geom.) Having twenty equal sides or faces.

Wiktionary
icosahedral

a. of, relating to, or having the shape of an icosahedron

WordNet
icosahedral

adj. of or relating to an icosahedron

Usage examples of "icosahedral".

The icosahedral exotic-matter frame that threaded the wormhole mouth exploded, a mirror image of the destruction witnessed by Miriam Berg fifteen centuries earlier.

He could begin work on the outer structure of that tantalizing icosahedral capsidthe protein overcoat worn by the carrier virus.

After studying the records of the last encounter, Ben had learned how the configuration of the icosahedral artifact anticipated the direction of the resulting beam.

Because of its icosahedral structure it is the roundest molecule possible.

Ben had learned how the configuration of the icosahedral artifact anticipated the direction of the resulting beam.

He could begin work on the outer structure of that tantalizing icosahedral capsid — the protein overcoat worn by the carrier virus.