| cephalothin | (noun) a semisynthetic analogue of cephalosporin | - |
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| lecithin | (noun) a yellow phospholipid essential for the metabolism of fats; found in egg yolk and in many plant and animal cells; used commercially as an emulsifier | - |
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| strophanthin | (noun) a bitter and very toxic glycoside derived from plants of the genus Strophanthus; in moderate doses it is a cardiac stimulant but in larger doses it is a powerful poison; used in Africa as an arrow poison | - |
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| zeaxanthin | (noun) yellow carotenoid (isomeric with lutein and occurs widely with it) that is the main pigment in yellow Indian corn | - |
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