trigonal
IPA: trˈɪgʌnʌɫ
adjective
- Having three angles and three sides, triangular.
- (crystallography) Of or pertaining to a crystal system with three equal and equally inclined but not perpendicular axes.
- (anatomy) Relating to the trigone
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Examples of "trigonal" in Sentences
- The horns are trigonal, laterally compressed and knotted on the upper edge.
- Pure corundum is a colorless, trigonal crystal with a hardness between that of emerald and diamond.
- Both have identical major ion chemistry CaCO3 but different structures: calcite is trigonal whilst aragonite is orthorhombic.
- [VENUS LATILIRATA] Shell sub-trigonal, thick and ponderous for its size; ribs fine, concentric, and very thick; irregularly stirate, crenulate upon the lower margin; umbo slightly flattened.
- "The general form is trigonal, or wedge form, valves closed, front produced, posterior short; margins usually crenulated; hinge teeth 2 -- 2; laterals 1 -- 1 in each valve; pallial sinus deep."
- The newest - and possibly the best - blue pigment in world history was born, due to manganese ions being structured in an unusual "trigonal bipyramidal coordination" in the presence of extreme heat.
- Moreover, some evidence suggests a cardiomyogenic differentiation capacity of MPCs, revealing the capacity to generate quadri - or trigonal cells positive for α-actinin and troponin I (data not shown).
- Horns very large, depressed and sub-trigonal at the base, attached to the highest line of the frontals, inclining upwards and backwards, conical towards the tip and bending upwards; muffle large, square.
- -- Here there is rotation of one portion with respect to the other through 180° about the principal (trigonal) axis, which is perpendicular to the plane c (111); or the same result may be obtained by reflection across this plane.
- Hornberg A, Tunemalm AK, Ekstrom F (2007) Crystal structures of acetylcholinesterase in complex with organophosphorus compounds suggest that the acyl pocket modulates the aging reaction by precluding the formation of the trigonal bipyramidal transition state.
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