Webster
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Webster’s Revised Unabridged Dictionary · 1913

Hermetically

Her·met′ic·al·ly, adv. 1. In an hermetical manner; chemically. Boyle.

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.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.