RHOMBOHEDRAL
rhombohedral, trigonal
(adjective) having threefold symmetry
Source: WordNet® 3.1
Etymology
Adjective
rhombohedral (not comparable)
(crystallography) Having three equal axes and oblique angles.
Synonyms
• rhombohedric
Source: Wiktionary
Rhom`bo*he"dral, a. (Geom. & Crystallog.)
Definition: Related to the rhombohedron; presenting the form of a rhombohedron, or a form derivable from a rhombohedron; relating to a system of forms including the rhombohedron and scalenohedron. Rhombohedral iron ore (Min.) See Hematite.
– Rhombohedral system (Crystallog.), a division of the hexagonal system embracing the rhombohedron, scalenohedron, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition
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