Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "hermetical" in a sentence
"The word is taken from Hermes, the Greek name for Mercury, the heathen god of arts and learning, and the supposed inventor of chemistry,  which is sometimes called the hermetical art; or perhaps from Hermes, an ancient king of Egypt, who was either its inventor, or excelled in it."
"He conceived a kind of hermetical or neoplatonic godhead creating in more and more eccentric circles, until the last, which rose in contradiction, was Lucifer to whom creation was committed."
"MADRID—Debussy once wrote that music should be "a hermetical science," encoded so that people didn't treat it "as casually as they do a handkerchief.""