Etymology
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monsignor (n.)

title conferred on some prelates and dignitaries of the papal court and household, 1640s, from Italian monsignore "my lord," formed on model of French monseigneur (see monseigneur) from equivalent elements in Italian.

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big bang (n.)
hypothetical explosive beginning of the universe, developed from the work of astronomers Monsignor Georges Henri Joseph Édouard Lemaître and George Gamow; the phrase is first attested 1950 (said to have been used orally in 1949) by British astronomer Fred Hoyle (1915-2001) in an attempt to explain the idea in laymen's terms.
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