Talk:adiabatic
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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: [1] --Dbachmann (talk) 08:18, 27 June 2017 (UTC)