Merriam-Webster Online Dictionary

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One entry found for occultation.
Main Entry: oc·cul·ta·tion
Pronunciation: "ä-(")k&l-'tA-sh&n
Function: noun
Date: 15th century
1 : the state of being hidden from view or lost to notice
2 : the interruption of the light from a celestial body or of the signals from a spacecraft by the intervention of a celestial body; especially : an eclipse of a star or planet by the moon