Crossword-Solution: HEMIHEDRAL
Dictionary
| Word | Word Type | Definition |
|---|---|---|
| Hemihedral | a. | Having half of the similar parts of a crystals, instead of all; consisting of half the planes which full symmetry would require, as when a cube has planes only on half of its eight solid angles, or one plane out of a pair on each of its edges; or as in the case of a tetrahedron, which is hemihedral to an octahedron, it being contained under four of the planes of an octahedron. |
We have 2 clues for the answer “HEMIHEDRAL”
| Clue | Answers |
|---|---|
| CRYSTAL having half number of planes given by complete symmetry | 1 answer |
| CRYSTAL form | 10 answers |
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Kind of apple
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Hint 1 meaning
One who, or that which, eats.
Hint 2 anagram
TEERA
Hint 3 another clue
greedy person
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Sentences with HEMIHEDRAL (5)
Etym: [Hemi- + holohedral.] (Crystallog.) Defn: Presenting hemihedral forms, in which half the sectants have the full number of planes.
Etym: [Holo- + hemihedral.] (Crystallog.) Defn: Presenting hemihedral forms, in which all the sectants have halt the whole number of planes.
Note: In crystallography, the regular tetrahedron is regarded as the hemihedral form of the regular octahedron.
The occurrence of hemihedral faces was considered by Pasteur to be a sufficient criterion for an optically active substance.
These two systems (the monoclinic and anorthic) were, however, considered by Weiss to be only hemihedral or tetartohedral modifications of the orthorhombic system, and they were not definitely established until 1835, when the optical characters of the crystals were found to be distinct.