[pen-tuh-hee-druh n] /ˌpɛn təˈhi drən/

noun, plural pentahedrons, pentahedra
[pen-tuh-hee-druh] /ˌpɛn təˈhi drə/ (Show IPA)
a solid figure having five faces.
noun (pl) -drons, -dra (-drə)
a solid figure having five plane faces See also polyhedron


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  • Pentahydrate

    [pen-tuh-hahy-dreyt] /ˌpɛn təˈhaɪ dreɪt/ noun, Chemistry. 1. a that contains five molecules of water, as potassium molybdate, KMoO 4 ⋅5H 2 O.

  • Pentahydric

    [pen-tuh-hahy-drik] /ˌpɛn təˈhaɪ drɪk/ adjective, Chemistry. 1. (especially of alcohols and phenols) pentahydroxy.

  • Pentahydroxy

    [pen-tuh-hahy-drok-see] /ˌpɛn tə haɪˈdrɒk si/ adjective, Chemistry. 1. (of a molecule) containing five hydroxyl groups.

  • Pentalpha

    [pen-tal-fuh] /pɛnˈtæl fə/ noun 1. .

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