tetragonal adjective. [tɪ'trag(ǝ)n(ǝ)l] L16.
[from TETRAGON + -AL¹.]
1. Of or pertaining to a tetragon; having four angles; quadrangular. In Botany & Zoology also, quadrangular in cross-section. L16.

2. Belonging to or being a crystal system in which there are three mutually perpendicular crystallographic axes, two being equal and the third of a different length. M19.

■ tetragonally adverb in a tetragonal manner or form L19.

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