from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To take away the phlogiston, i.e. ability to burn, which is now understood to be chemically impossible
from The Century Dictionary and Cyclopedia
- To deprive of phlogiston, once supposed to exist as the principle of inflammability. See phlogiston.
- In medicine, to reduce inflammation in.
From the prefix de-, to undo and phlogisticate, to give flammability to, from French déphlogistiguer, to dephlogisticate. (Wiktionary)