arris
ar.ris \'ar-*s\ n or arris or ar.ris.es [prob. modif. of MF areste, lit., fishbone, fr. LL arista - more] pl at ARE^TE : the sharp edge or salient angle formed by the meeting of two surfaces es p. in moldings
Webster's English Dictionaryar.ris \'ar-*s\ n or arris or ar.ris.es [prob. modif. of MF areste, lit., fishbone, fr. LL arista - more] pl at ARE^TE : the sharp edge or salient angle formed by the meeting of two surfaces es p. in moldings