cipher
Cross references: 1. code 1. ci.pher \'si--f*r\ n [ME, fr. MF cifre, fr. ML cifra, fr. Ar ssub-dot>ifr] often attrib empty, cipher, zero 1a: the symbol 0 denoting the absence of all magnitude or quantity : Z ERO 1b: an insignificant individual : NONENTITY 2a: a method of transforming a text in order to conceal its meaning 2b: a message in code 3: an Arabic numeral 4: a combination of symbolic letters; esp : the interwoven initials of a name 2. cipher \-f(*-)rin\ vb or ci.pher.ing : to use figures in a mathematical process 1: ENCIPHER 2: to compute arithmetically
Webster's English Dictionary