| actomyosin | (noun) a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions | - |
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| angiotensin | (noun) any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels | Synonyms: angiotonin, Hypertensin |
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| arcsin | (noun) the inverse function of the sine; the angle that has a sine equal to a given number | Synonyms: arc sine, arcsine, inverse sine |
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| assassin | (noun) a murderer (especially one who kills a prominent political figure) who kills by a surprise attack and often is hired to do the deed | Synonyms: assassinator, bravo |
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| (noun) a member of a secret order of Muslims (founded in the 12th century) who terrorized and killed Christian Crusaders | - |
| basin | (noun) a bowl-shaped vessel; usually used for holding food or liquids | - |
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| (noun) a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face | Synonyms: lavatory, washbasin, washbowl, washstand |
| (noun) the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet | Synonyms: catchment area, catchment basin, drainage area, drainage basin, river basin, watershed |
| (noun) a natural depression in the surface of the land often with a lake at the bottom of it | - |
| (noun) the quantity that a basin will hold | Synonyms: basinful |
| bromeosin | (noun) a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures | Synonyms: eosin |
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| ceresin | (noun) a white wax extracted from ozokerite | - |
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| chymosin | (noun) an enzyme that occurs in gastric juice; causes milk to coagulate | Synonyms: rennin |
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| cousin | (noun) the child of your aunt or uncle | Synonyms: cousin-german, first cousin, full cousin |
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| cytolysin | (noun) a substance that partly or completely destroys animal cells | - |
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| doxazosin | (noun) an antihypertensive drug (trade name Cardura) that works by relaxing blood vessels so that blood passes through them more easily; it is also used to treat benign prostatic hyperplasia | Synonyms: Cardura |
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| eosin | (noun) a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures | Synonyms: bromeosin |
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| erythrocytolysin | (noun) any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin | Synonyms: erythrolysin, haemolysin, hemolysin |
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| erythrolysin | (noun) any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin | Synonyms: erythrocytolysin, haemolysin, hemolysin |
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| fibrinolysin | (noun) an enzyme that dissolves the fibrin of blood clots | Synonyms: plasmin |
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| haemolysin | (noun) any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin | Synonyms: erythrocytolysin, erythrolysin, hemolysin |
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| handbasin | (noun) a basin for washing the hands | Synonyms: lavabo, wash-hand basin, washbasin, washbowl |
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| hemolysin | (noun) any substance that can cause lysis (destruction) of erythrocytes (red blood cells) and the release of their hemoglobin | Synonyms: erythrocytolysin, erythrolysin, haemolysin |
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| iodopsin | (noun) a violet photopigment in the retinal cones of the eyes of most vertebrates; plays a role in daylight vision | - |
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| khamsin | (noun) an oppressively hot southerly wind from the Sahara that blows across Egypt in the spring | - |
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| lypressin | (noun) an antidiuretic and vasoconstrictor used to treat diabetes insipidus | - |
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| lysin | (noun) any substance (such as an antibody) or agent that can cause lysis | - |
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| mocassin | (noun) soft leather shoe; originally worn by Native Americans | Synonyms: moccasin |
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| moccasin | (noun) soft leather shoe; originally worn by Native Americans | Synonyms: mocassin |
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| myosin | (noun) the commonest protein in muscle; a globulin that combines with actin to form actomyosin | - |
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| neurolysin | (noun) any toxin that affects neural tissues | Synonyms: neurotoxin |
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| oleoresin | (noun) a naturally occurring mixture of a resin and an essential oil; obtained from certain plants | - |
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| opsin | (noun) retinal protein formed by the action of light on rhodopsin | - |
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| pepsin | (noun) an enzyme produced in the stomach that splits proteins into peptones | - |
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| prazosin | (noun) antihypertensive drug (trade name Minipress) | Synonyms: Minipress |
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| psilotsin | (noun) a substituted tryptamine alkaloid and a serotonergic psychedelic substance, present in most psychedelic mushrooms together with its phosphorylated counterpart psilocybin. | Synonyms: psilocin, psilocine, psilocyn |
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| raisin | (noun) dried grape | - |
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| resin | (noun) any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules | Synonyms: rosin |
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| rhodopsin | (noun) a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light | Synonyms: retinal purple, visual purple |
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| rosin | (noun) any of a class of solid or semisolid viscous substances obtained either as exudations from certain plants or prepared by polymerization of simple molecules | Synonyms: resin |
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| (verb) rub rosin onto | - |
| sannyasin | (noun) a Hindu religious mendicant | Synonyms: sannyasi, sanyasi |
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| sin | (noun) an act that is regarded by theologians as a transgression of God's will | Synonyms: sinning |
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| (noun) estrangement from god | Synonyms: sinfulness, wickedness |
| (noun) the 21st letter of the Hebrew alphabet | - |
| (noun) ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle | Synonyms: sine |
| (verb) commit a sin; violate a law of God or a moral law | Synonyms: transgress, trespass |
| (verb) commit a faux pas or a fault or make a serious mistake | Synonyms: blunder, boob, drop the ball, goof |
| streptolysin | (noun) any of several hemolysins derived from strains of streptococcus | - |
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| terazosin | (noun) antihypertensive drug (trade name Hytrin) used to treat high blood pressure | Synonyms: Hytrin |
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| thymosin | (noun) hormone secreted by the thymus; stimulates immunological activity of lymphoid tissue | - |
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| tocsin | (noun) a bell used to sound an alarm | Synonyms: warning bell |
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| (noun) the sound of an alarm (usually a bell) | Synonyms: alarm bell |
| trypsin | (noun) an enzyme of pancreatic origin; catalyzes the hydrolysis of proteins to smaller polypeptide units | - |
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| vasopressin | (noun) hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules | Synonyms: ADH, antidiuretic hormone, Pitressin |
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| washbasin | (noun) a basin for washing the hands | Synonyms: handbasin, lavabo, wash-hand basin, washbowl |
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| (noun) a bathroom sink that is permanently installed and connected to a water supply and drainpipe; where you can wash your hands and face | Synonyms: basin, lavatory, washbowl, washstand |