The mathematical symbol (0) denoting absence of quantity; zero.
An Arabic numeral or figure; a number.
One having no influence or value; a nonentity.
A cryptographic system in which units of plain text of regular length, usually letters, are arbitrarily transposed or substituted according to a predetermined code.
The key to such a system.
A message written or transmitted in such a system.
A design combining or interweaving letters or initials; a monogram.
To solve problems in arithmetic; calculate. See Synonyms at calculate.