| LUL | <abbreviation> Left upper lobe (of lung). (05 Mar 2000) |
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| luliberin | A decapeptide hormone from the hypothalamus that stimulates the anterior pituitary to release both follicle-stimulating hormone and luteinizing hormone. Synonym: luteinizing hormone-releasing hormone. Origin: Luteinizing hormone + L. Libero, to free, + -in (05 Mar 2000) |