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Related to icosahedra: Icosahedral symmetry
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 (ī-kō′sə-hē′drən, ī-kŏs′ə-)
n. pl. i·co·sa·he·drons or i·co·sa·he·dra (-drə)
A polyhedron having 20 faces.

[Greek eikosaedron, from neuter of Greek eikosaedros, twenty-sided : eikosi, twenty; see wīkm̥tī- in Indo-European roots + -edros, -sided; see -hedron.]

i·co′sa·he′dral (-drəl) adj.


n, pl -drons or -dra (-drə)
(Mathematics) a solid figure having 20 faces. The faces of a regular icosahedron are equilateral triangles
[C16: from Greek eikosaedron, from eikosi twenty + -edron -hedron]
ˌicosaˈhedral adj


(aɪˌkoʊ səˈhi drən, aɪˌkɒs ə-)

n., pl. -drons, -dra (-drə).
a solid figure having 20 faces.
[1560–70; < Greek eikosáedron=eikosa-, variant of eikosi-, comb. form of eíkosi twenty + -edron -hedron]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.icosahedron - any polyhedron having twenty plane facesicosahedron - any polyhedron having twenty plane faces
polyhedron - a solid figure bounded by plane polygons or faces
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General characteristics of begomoviruses (geminiviruses): Geminiviruses (family Geminiviridae) are small, non-enveloped plant-infecting viruses with circular single-stranded DNA (ssDNA) genomes of 2.5-5.2 kb, and a unique particle morphology, consisting of twinned (geminate) incomplete icosahedra (T=1, 22 nm x 38 nm) with a single coat protein (Zerbini et al., 2017).
Yang, "Highly uniform platinum icosahedra made by hot injection-assisted GRAILS method," Nano Letters, vol.
SASA is the solvent accessible surface area and is determined by recursively approximating a sphere around each atom, starting from icosahedra (ICOSA method).
The value [DELTA]Q of the decagonal alloys are smaller than icosahedra's alloys, the difference is particularly remarkable in the main peak reflection, Q [congruent to] 30[nm.sup.-1] indicating that the characteristic magnitude of the voltage to the phasons of quasicrystalline structure is considerably lower for decagonal phase even after rapid solidification [24].
Nasilowski et al., "Quantum dot-loaded monofunctionalized DNA icosahedra for single-particle tracking of endocytic pathways," Nature Nanotechnology, vol.
TEHRAN (FNA)- Using novel computational and biochemical approaches, scientists have designed and built from scratch 10 large protein icosahedra that are similar to viral capsids that carry viral DNA.