Английский разговорный словарь (основной) - hermetic

hə:ˈmetɪk adj. (also hermetical) 1 with an airtight closure. 2 protected from outside agencies. 3 a of alchemy or other occult sciences (hermetic art). b esoteric. øhermetic seal an airtight seal (orig. as used by alchemists). øøhermetically adv. hermetism n. [mod.L hermeticus irreg. f. Hermes Trismegistus thrice-greatest Hermes (as the founder of alchemy)]