Legendrian,a.Math.|lɪˈdʒɛndrɪən| [f. name of A. M. Legendre(seeprec.).] Pertaining to or invented by the mathematician Legendre, as Legendrian coefficient, Legendrian function, Legendrian symbol. 1882Encycl.Brit. XIV. 414/1 The theory of the Legendrian Coefficients.