- (a.) Of or pertaining to the system which explains the causes of diseases and the operations of medicine on the principles of the hermetic philosophy, and which made much use, as a remedy, of an alkali and an acid; as, hermetic medicine.
- (a.) Of, pertaining to or taught by, Hermes Trismegistus; as, hermetic philosophy. Hence: Alchemical; chemic.
- (a.) Made perfectly close or air-tight by fusion, so that no gas or spirit can enter or escape; as, an hermetic seal. See Note under Hermetically.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). hermetical. Retrieved September 21, 2026, from http://smartdefine.org/hermetical/definitions/2016181 |
| Chicago | Webster's. 2011. "hermetical" http://smartdefine.org/hermetical/definitions/2016181 (accessed September 21, 2026). |
| Harvard | Webster's 2011, hermetical, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/hermetical/definitions/2016181>. |
| MLA | Webster's. "hermetical" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/hermetical/definitions/2016181> |