| astrolabe | (noun) an early form of sextant | - |
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| glabella | (noun) a smooth prominence of the frontal bone between and above the eyebrows; the most forward projecting point of the forehead in the midline at the level of the supraorbital ridges | Synonyms: mesophyron |
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| label | (noun) an identifying or descriptive marker that is attached to an object | - |
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| (noun) a brief description given for purposes of identification | - |
| (noun) trade name of a company that produces musical recordings | Synonyms: recording label |
| (noun) a radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction | - |
| labetalol | (noun) antihypertensive drug (trade names Trandate and Normodyne) that blocks alpha and beta-adrenergic receptors of the sympathetic nervous system (leading to a decrease in blood pressure) | Synonyms: labetalol hydrochloride, Normodyne, Trandate |
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