Definition of tetragonal in English:


Line breaks: tet|rag¦on¦al
Pronunciation: /tɪˈtrag(ə)n(ə)l


  • Of or denoting a crystal system or three-dimensional geometrical arrangement having three axes at right angles, two of them equal.
    More example sentences
    • Superb, equant tetragonal crystals occur on quartz in the junction pockets.
    • The crystals are typically tetragonal dipyramids with pinacoids.
    • Narsarsukite is another tetragonal mineral that can show a tetragonal prismatic habit, particularly when it develops in open cavities.


late 16th century: via late Latin from Greek tetragōnon (neuter of tetragōnos 'four-angled') + -al.

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