HERMETICALLY

hermetically. Hermetically, ad. in a hermetical manner

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Her‐met″ic‐al‐ly, adv. 1. 1. In an hermetical manner; chemically. Boyle.
2. 2. By fusion, so as to form an air-tight closure.
☞ A vessel or tube is hermetically sealed when it is closed completely against the passage of air or other fluid by fusing the extremity; — sometimes less properly applied to any air-tight closure.