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anhedral
anhedral, a. (ænˈhiːdrəl, -ˈhɛdrəl) [f. an- 10 + hedral a.] Applied to crystals that are not bounded by plane faces; also called allotriomorphic, xenomorphic. So anˈhedron, a crystal of this kind.1896 L. V. Pirsson in Amer. Geologist XVII. 94 Since the term crystal, when strictly used, means a body ...
Oxford English Dictionary
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Anhedral
Anhedral may refer to:
Anhedral angle, the downward angle from horizontal of the wings or tailplane of a fixed-wing aircraft
Anhedral (petrology),
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Euhedral and anhedral
The opposite is anhedral (also known as xenomorphic or allotriomorphic): a rock with an anhedral texture is composed of mineral grains that have no well-formed Anhedral crystal growth occurs in a competitive environment with no free space for the formation of crystal faces.
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euhedral
euhedral, a. (juːˈhiːdrəl, -ˈhɛdrəl) [f. eu- + hedral a.] = idiomorphic a.1906 J. P. Iddings Rock Minerals ii. 64 Euhedral, well faced, completely bounded by crystal planes, automorphic, idiomorphic. 1913, etc. [see anhedral a.].
Oxford English Dictionary
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Dihedral (aeronautics)
Anhedral and polyhedral
Anhedral
Military fighter aircraft often have near zero or even anhedral angle reducing dihedral effect and hence reducing the Polyhedral
Most aircraft have been designed with planar wings with simple dihedral (or anhedral).
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allotriomorphic
allotriomorphic, a. Min. (æˌlɒtrɪəʊˈmɔːfɪk) [ad. G. allotriomorph (H. Rosenbusch Mikrosk. Physiog. d. Massigen Gest. (1886) i. 11), f. Gr. ἀλλότριος belonging to another (ἄλλος other) + µορϕή form: see -ic.] = xenomorphic a. (opp. idiomorphic). Hence aˌllotrioˈmorphically adv. Cf. anhedral a.1887 Ge...
Oxford English Dictionary
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Dihedral
doors, also known as butterfly doors
Dihedral prime, also known as a dihedral calculator prime
In rock climbing, an inside corner of rock
See also
Anhedral
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Powellite
Powellite crystallizes with tetragonal – dipyramidal crystal structure as transparent adamantine blue, greenish-brown, yellow-to-grey typically anhedral
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Granoblastic
Granoblastic is an adjective describing an anhedral phaneritic equi-granular metamorphic rock texture.
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سحنة بلورية
عندما تكون أوجه البلورة مكتملة تدعى حينها كاملة الأوجه euhedral أما في حال عدم اكتمال أحدها فتدعى غير كاملة الأوجه anhedral.
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Northrop N-1
The vertical stabilizers were replaced with drooped wingtips with an anhedral of 35 degrees, which were apparently found to stabilize paper planes during Later, the stabilizer was deleted, with the anhedral of the wingtips increased to 40 degrees to make up for it, and a retractable tail wheel was added
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Hendricksite
These crystals are more commonly anhedral - a crystal with no faces, but rarely they can be euhedral - crystals with well defined surfaces. The anhedral crystals can grow up to 30 cm, and are commonly deformed, while the euhedral crystals can reach 14 cms in size of mechanical deformation.
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Naldrettite
Naldrettite occurs as anhedral grains that are commonly attached to sulfide minerals and are associated with clinochlore.
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Oldhamite
It crystallizes in the cubic crystal system, but typically occurs as anhedral grains between other minerals.
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Loellingite
It also occurs in anhedral masses and tarnishes on exposure to air.
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