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[hep-tuh-kawrd] /ˈhɛp təˌkɔrd/

a musical scale of seven notes.
an interval of a seventh.
an ancient Greek stringed instrument.


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  • Heptad

    [hep-tad] /ˈhɛp tæd/ noun 1. the number seven. 2. a group of seven. 3. Chemistry. an element, atom, or group having a valence of seven. /ˈhɛptæd/ noun 1. a group or series of seven 2. the number or sum of seven 3. an atom or element with a valency of seven

  • Heptadecanoic acid

    /ˌhɛptəˌdɛkəˈnəʊɪk/ noun 1. a colourless crystalline water-insoluble carboxylic acid used in organic synthesis. Formula: CH3(CH2)15COOH Also called margaric acid

  • Heptagon

    [hep-tuh-gon, -guh n] /ˈhɛp təˌgɒn, -gən/ noun 1. a polygon having seven angles and seven sides. /ˈhɛptəɡən/ noun 1. a polygon having seven sides n. 1560s, from Middle French heptagon, from Greek heptagonon, from hepta “seven” (cognate with Latin septem, Gothic sibun, Old English seofon; see seven) + gonia “angle” (see knee (n.)). Related: Heptagonal. […]

  • Heptagonal

    [hep-tag-uh-nl] /hɛpˈtæg ə nl/ adjective 1. having seven sides or angles.

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