01 a. Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetrag…
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1.
Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers.(Geom.)
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2.
Having four prominent longitudinal angles.(Bot.)
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3.
Designating, or belonging to, a certain system of crystallization; dimetric. See Tetragonal system, under Crystallization.(Crystallog.) See: Crystallization