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noun, Astronomy.
a number (preceded by M) designating the 109 double stars, clusters, nebulae, and galaxies in the Messier catalog.


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    [mes-uh-lee] /ˈmɛs ə li/ adverb 1. in a manner.

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    [mes-uh n] /ˈmɛs ən/ noun, Scot. 1. . [mes-uh n] /ˈmɛs ən/ noun, Scot. 1. a lap dog; small pet dog.

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    [French me-seen] /French mɛˈsin/ noun 1. a village in W Belgium, near Ypres: battles 1914, 1917.

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