| apoenzyme | (noun) a protein that combines with a coenzyme to form an active enzyme | - |
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| azymia | (noun) absence of an enzyme | - |
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| benzyl | (noun) the univalent radical derived from toluene | Synonyms: benzyl group, benzyl radical |
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| benzylpenicillin | (noun) the penicillin that constitutes the principal component of many commercial antibiotics | Synonyms: penicillin G |
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| chlorobenzylidenemalononitrile | (noun) a tear gas that is stronger than CN gas but wears off faster; can be deployed by grenades or cluster bombs; can cause skin burns and fatal pulmonary edema | Synonyms: CS gas |
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| coenzyme | (noun) a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes | - |
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| cozy | (noun) a padded cloth covering to keep a teapot warm | Synonyms: cosy, tea cosy, tea cozy |
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| crazy | (noun) someone deranged and possibly dangerous | Synonyms: looney, loony, nutcase, weirdo |
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| crazyweed | (noun) any of several leguminous plants of western North America causing locoism in livestock | Synonyms: crazy weed, locoweed |
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| enzyme | (noun) any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions | - |
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| enzymologist | (noun) a person who is trained in or engaged in enzymology | - |
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| enzymology | (noun) the branch of biochemistry dealing with the chemical nature and biological activity of enzymes | - |
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| floozy | (noun) a prostitute who attracts customers by walking the streets | Synonyms: floozie, hooker, hustler, slattern, street girl, streetwalker |
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| frenzy | (noun) state of violent mental agitation | Synonyms: craze, delirium, fury, hysteria |
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| heterozygosity | (noun) the state of being heterozygous; having two different alleles of the same gene | - |
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| heterozygote | (noun) (genetics) an organism having two different alleles of a particular gene and so giving rise to varying offspring | - |
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| homozygosity | (noun) the state of being homozygous; having two identical alleles of the same gene | - |
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| homozygote | (noun) (genetics) an organism having two identical alleles of a particular gene and so breeding true for the particular characteristic | - |
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| lazybones | (noun) a lazy person | - |
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| lysozyme | (noun) an enzyme found in saliva and sweat and tears that destroys the cell walls of certain bacteria | Synonyms: muramidase |
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| proenzyme | (noun) any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active | Synonyms: zymogen |
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| syzygy | (noun) the straight line configuration of 3 celestial bodies (as the sun and earth and moon) in a gravitational system | - |
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| tizzy | (noun) an excited state of agitation | Synonyms: dither, flap, fuss, pother |
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| zydeco | (noun) music of southern Louisiana that combines French dance melodies with Caribbean music and blues | - |
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| zygoma | (noun) the slender arch formed by the temporal process of the cheekbone that bridges to the zygomatic process of the temporal bone | Synonyms: arcus zygomaticus, zygomatic arch |
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| zygomatic | (noun) the arch of bone beneath the eye that forms the prominence of the cheek | Synonyms: cheekbone, jugal bone, malar, malar bone, os zygomaticum, zygomatic bone |
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| zygospore | (noun) a plant spore formed by two similar sexual cells | - |
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| zygote | (noun) (genetics) the diploid cell resulting from the union of a haploid spermatozoon and ovum (including the organism that develops from that cell) | Synonyms: fertilized ovum |
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| zygotene | (noun) the second stage of the prophase of meiosis | - |
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| zymase | (noun) a complex of enzymes that cause glycolysis; originally found in yeast but also present in higher organisms | - |
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| zymogen | (noun) any of a group of compounds that are inactive precursors of enzymes and require some change (such as the hydrolysis of a fragment that masks an active enzyme) to become active | Synonyms: proenzyme |
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| zymology | (noun) the branch of chemistry concerned with fermentation (as in making wine or brewing or distilling) | Synonyms: zymurgy |
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| zymolysis | (noun) a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol | Synonyms: ferment, fermentation, fermenting, zymosis |
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| zymosis | (noun) (medicine) the development and spread of an infectious disease (especially one caused by a fungus) | - |
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| (noun) a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol | Synonyms: ferment, fermentation, fermenting, zymolysis |
| zymurgy | (noun) the branch of chemistry concerned with fermentation (as in making wine or brewing or distilling) | Synonyms: zymology |
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