trigonal

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Related to trigonally: monoclinic

trig·o·nal

(trig'ō-năl),
Triangular; relating to a trigonum.

trig·o·nal

(trig'ŏ-năl)
Triangular; relating to a trigonum.
References in periodicals archive ?
(c) Schematic plan view of the trigonally modified octahedral coordination of [Al.sup.3+] by [O.sup.2-] in [alpha]-[Al.sub.2][O.sub.3] showing one [O.sup.2-] triangle (lower, dashed) slightly larger and rotated relative to the other (upper, solid).
The levels in the trigonally distorted octahedral ruby crystal field are shown in the center; the levels of the excited states of the free [Cr.sup.3+]ion from which the crystal field levels derive are shown on the left.