lipo- (1) Look up lipo- at Dictionary.com
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) Look up lipo- at Dictionary.com
word-forming element in biological compounds meaning "be lacking, having no," from Greek leipein "to leave, be lacking," from PIE root *leikw- "to leave."