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English definition of “tangent”

tangent

noun [C] uk   /ˈtæn.dʒənt/ specialized us  

tangent noun [C] (CIRCLE)

a straight line that touches but does not cut into a curve

tangent noun [C] (TRIANGLE)

(written abbreviation tan) (in a triangle that has one angle of 90°) the ratio of the length of the side opposite an angle less than 90° divided by the length of the shorter of the two sides that are next to the angle
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tangential
adjective uk   /tænˈdʒen.ʃəl/ us  
(Definition of tangent from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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