| adenine | (noun) (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA | Synonyms: A |
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| alanine | (noun) a crystalline amino acid that occurs in many proteins | - |
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| arginine | (noun) a bitter tasting amino acid found in proteins and necessary for nutrition; its absence from the diet leads to a reduced production of spermatozoa | - |
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| buteonine | (noun) any hawk of the genus Buteo | - |
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| canavanine | (noun) an amino acid found in the jack bean | - |
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| canine | (noun) any of various fissiped mammals with nonretractile claws and typically long muzzles | Synonyms: canid |
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| (noun) one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars | Synonyms: canine tooth, cuspid, dogtooth, eye tooth, eyetooth |
| cinchonine | (noun) an alkaloid derivative of the bark of cinchona trees that is used as an antimalarial drug | - |
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| dihydroxyphenylalanine | (noun) amino acid that is formed in the liver and converted into dopamine in the brain | Synonyms: dopa |
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| feminine | (noun) a gender that refers chiefly (but not exclusively) to females or to objects classified as female | - |
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| guanine | (noun) a purine base found in DNA and RNA; pairs with cytosine | Synonyms: G |
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| guaranine | (noun) Guaranine is the name used to describe caffeine derived from the guarana plant. | - |
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| iodothyronine | (noun) thyronine with iodine added | - |
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| liothyronine | (noun) thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer | Synonyms: T, triiodothyronine |
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| methionine | (noun) a crystalline amino acid containing sulfur; found in most proteins and essential for nutrition | - |
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| mezzanine | (noun) intermediate floor just above the ground floor | Synonyms: entresol, mezzanine floor |
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| (noun) first or lowest balcony | Synonyms: first balcony |
| nine | (noun) one of four playing cards in a deck with nine pips on the face | Synonyms: nine-spot |
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| (noun) a team of professional baseball players who play and travel together | Synonyms: ball club, baseball club, club |
| (noun) the cardinal number that is the sum of eight and one | Synonyms: 9, ennead, IX, Nina from Carolina, niner |
| phenylalanine | (noun) an essential amino acid found in proteins and needed for growth of children and for protein metabolism in children and adults; abundant in milk and eggs; it is normally converted to tyrosine in the human body | - |
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| quinine | (noun) a bitter alkaloid extracted from chinchona bark; used in malaria therapy | - |
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| saffranine | (noun) any of a class of chiefly red organic dyes | Synonyms: safranin, safranine |
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| safranine | (noun) any of a class of chiefly red organic dyes | Synonyms: saffranine, safranin |
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| strychnine | (noun) an alkaloid plant toxin extracted chiefly from nux vomica; formerly used as a stimulant | - |
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| tetraiodothyronine | (noun) hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells | Synonyms: T, thyroxin, thyroxine |
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| thioguanine | (noun) an antineoplastic drug used to treat acute leukemias | - |
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| threonine | (noun) a colorless crystalline amino acid found in protein; occurs in the hydrolysates of certain proteins; an essential component of human nutrition | - |
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| thyronine | (noun) a phenolic amino acid of which thyroxine is a derivative | - |
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| triiodothyronine | (noun) thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer | Synonyms: liothyronine, T |
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