hermetic /her·met·ic/ (her-met´ik) impervious to air.
hermetic
her·met·ic (h r-m t  k) or her·met·i·cal (--kl)adj. Completely sealed, especially against the escape or entry of air. her·met i·cal·ly adv. |
hermetic
[hərmet′ik]
Etymology: Gk, Hermes
from use in alchemy, pertaining to sealing a container so as to make it airtight.
hermetic
impervious to the air.
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