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[ek-spluh-muh nt]
noun Mathematics.
  1. the quantity by which an angle or an arc falls short of 360° or a circle.
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Origin of explement

1585–95; < Latin explēmentum that which fills up, equivalent to explē(re) to fill (ex- ex-1 + plēre to fill) + -mentum -ment
Related formsex·ple·men·tal [ek-spluh-men-tl] /ˌɛk spləˈmɛn tl/, ex·ple·men·ta·ry [ek-spluh-men-tuh-ree, -tree] /ˌɛk spləˈmɛn tə ri, -tri/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018