Longman Dictionary of Contemporary English homepage

Date: 1500-1600
Language: Medieval Latin
Origin: sinus, from Latin; SINUS

sine

 noun
     
Related topics: Maths
sine [countable] technical
HM the fraction (2) calculated for an angle by dividing the length of the side opposite it in a triangle that has a right angle, by the length of the the side opposite the right angle
Definition from the Longman Dictionary of Contemporary English
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