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lipo- (1)

word-forming element meaning "fat" (n.), from Greek lipos "fat" (n.), from PIE root *leip- "to stick, adhere," also used to form words for "fat."

lipo- (2)

word-forming element in biological compounds meaning "be lacking, having no," from Greek leipein "to leave, be lacking," from PIE root *leikw- "to leave."