Crossword-Solution: OCTAHEDRA
We have 6 clues for the answer “OCTAHEDRA”
| Clue | Answers |
|---|---|
| Eight-faced solids | 1 answer |
| Eight-sided solids | 1 answer |
| They've got two more sides than cubes | 1 answer |
| Unusual dice | 1 answer |
| pulral of octahedron: any polyhedron having eight plane faces | 1 answer |
| solid eight-sided figures; octahedrons | 1 answer |
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Section of a curve
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A
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R
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C
Hint 1 meaning
The apparent arc described, above or below the horizon, by the
sun or other celestial body. The diurnal arc is described during the
daytime, the nocturnal arc during the night.
Hint 2 anagram
ACR
Hint 3 another clue
AID WHEN GOING TO COURT
60 +1
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Sentences with OCTAHEDRA (5)
Sulphur can be obtained in two crystalline modifications, in orthorhombic octahedra, or in monoclinic prisms, the former of which is the more stable at ordinary temperatures.
Such regular interpenetrations are known in crystallography as "twins." There are also twins of diamond in which two octahedra (fig.
The alum there produced is the double basic potassium alum, and crystallizes into cubes instead of octahedra, _i.e._, the Roman alum of commerce.
Although from a geometrical point of view these figures are no longer symmetrical with respect to the axes and planes of symmetry, yet crystallographically they are just as symmetrical as the ideally developed form, and, however much their irregularity of development, they still are regular (cubic) octahedra of crystallography.
Calcium ferrite, magnesium ferrite and zinc ferrite, RO·Fe2O3 (R = Ca, Mg, Zn), are obtained by intensely heating mixtures of the oxides; magnesium ferrite occurs in nature as the mineral magnoferrite, and zinc ferrite as franklinite, both forming black octahedra.
Where this answer appears
Appears in: NYT.
Used 2 times in crossword archives (2000–2019).