A device or person that converts something from one form into another (alternative spelling of converter).
Convert + -or (agent noun suffix). Both 'convertor' and 'converter' exist as variants, with 'converter' now dominant in modern English, though 'convertor' persists in legal and technical documents.
The -or/-er variation in English agent nouns (actor/acter, advisor/adviser) reflects historical spelling variation. 'Convertor' appears in older patents and contracts because legal language tends to preserve older spellings for consistency and tradition.
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