dephlegmatorn.

/ˈdiːflɛɡmeɪtə/Etymology: Agent-noun in Latin form < modern Latin dēphlegmāre to dephlegmate v.
1828 S. F. Gray 767 This dephlegmator is formed of two broad sheets of tinned copper, soldered together so as to leave only 1/ 6th of an inch between them.
1876 No. 4376.
This entry has not yet been fully updated (first published 1895; most recently modified version published online March 2019).