Talk:adiabatic

etymonline.com claims attestation in 1838, presumably not in Rankine's technical sense but more loosely referring to [thermal] insulation, but I have not been able to find a reference before Rankine's (1866). --Dbachmann (talk) 08:14, 27 June 2017 (UTC)
 * possible attestation (of the adverb) from 1859: --Dbachmann (talk) 08:18, 27 June 2017 (UTC)