reformer

noun4

1. •
   One who reforms, or who works for reform.
2. •
   (historical) One who was involved in the Reformation.

   • […] for I long to see a larke without a creast, and would travaile farre to discoover a reformer without a fault, […] — 1593
3. •
   A device which converts hydrocarbons into a hydrogen-rich mixture of gases.
4. •
   A device used to convert petroleum refinery naphthas, typically having low octane ratings, into high-octane liquid products called reformates.

   • Deisohexanizer bottoms are routed to the continuous reformer, where the octane of the stream is upgraded chiefly by conversion of naphthenes and paraffins to high octane aromatic compounds. — 1979

noun3

1. •
   A member of the Reform Party of Canada, which existed from 1987 to 2000.
2. •
   (UK) A member or supporter of Reform UK.
3. •
   (Canada, historical) A member of the Reform movement in 19th-century Canada.