Cyber-form was a term used by the Cybermen to refer to the form they had attained following cyber-conversion.
In Pete's World, the converted Jackie Tyler informed her husband that she was cyber-form. (TV: The Age of Steel)
In 2011, one of a group of six Cybermen in Colchester told the Eleventh Doctor that they would convert the Earth to cyber-form. They were ultimately defeated by the Doctor before they could do so. (TV: Closing Time)