trigonal

• Устаревшее прилагательное, означающее треугольный или трёхугольный; в настоящее время редко используется, за исключением специализированных исторических или кристаллографических контекстов.

An obsolete adjective meaning triangular or three-cornered; now rarely used except in specialized historical or crystallographic contexts.

1. Having threefold symmetryC2formalscientific

   Relating to or characterized by threefold symmetry, often used in crystallography to describe a crystal system.

   Тригональный

   • The mineral calcite crystallizes in the trigonal system.
   • Trigonal symmetry is common in certain gemstones like quartz.
   • The crystal's trigonal structure was confirmed by X-ray diffraction.

   Synonymsrhombohedral