lunar excursion module
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Related to lunar excursion module: lunar eclipse
lunar excursion module[′lü·nər ik¦skər·zhən ¦maj·ül]
A manned spacecraft designed to be carried on top of the Apollo service module and having its own power plant for making a manned landing on the moon and a return from the moon to the orbiting Apollo spacecraft. Abbreviated LEM. Also known as lunar module (LM).