| acrolein | (noun) a pungent colorless unsaturated liquid aldehyde made from propene | Synonyms: propenal |
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| caffein | (noun) a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects | Synonyms: caffeine |
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| casein | (noun) a water-base paint made with a protein precipitated from milk | Synonyms: casein paint |
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| (noun) a milk protein used in making e.g. plastics and adhesives | - |
| checkrein | (noun) a rein designed to keep the horse's head in the desired position | Synonyms: bearing rein |
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| devein | (verb) remove the dark dorsal vein of (a shrimp) | - |
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| fetoprotein | (noun) any of several antigens that occur naturally in the fetus and sometimes in adults with cancer | Synonyms: foetoprotein |
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| fluorescein | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluoresceine, fluorescent dye, resorcinolphthalein |
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| foetoprotein | (noun) any of several antigens that occur naturally in the fetus and sometimes in adults with cancer | Synonyms: fetoprotein |
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| gegenschein | (noun) a faint spot of light in the night sky that appears directly opposite the position of the sun; a reflection of sunlight by micrometeoric material in space | Synonyms: counterglow |
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| glycoprotein | (noun) a conjugated protein having a carbohydrate component | - |
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| haemoprotein | (noun) a conjugated protein linked to a compound of iron and porphyrin | Synonyms: hemoprotein |
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| hemoprotein | (noun) a conjugated protein linked to a compound of iron and porphyrin | Synonyms: haemoprotein |
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| herein | (adverb) in this place or thing or document | - |
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| iodoprotein | (noun) a protein that contains iodine | Synonyms: iodinated protein |
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| lipoprotein | (noun) a conjugated protein having a lipid component; the principal means for transporting lipids in the blood | - |
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| lutein | (noun) yellow carotenoid pigments in plants and animal fats and egg yolks | Synonyms: xanthophyl, xanthophyll |
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| midvein | (noun) the vein in the center of a leaf | Synonyms: midrib |
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| mujahadein | (noun) a military force of Muslim guerilla warriors engaged in a jihad | Synonyms: mujahadeen, mujahadin, mujahedeen, mujahedin, mujahideen, mujahidin |
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| mullein | (noun) any of various plants of the genus Verbascum having large usually woolly leaves and terminal spikes of yellow or white or purplish flowers | Synonyms: flannel leaf, velvet plant |
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| nucleoprotein | (noun) any of several substances found in the nuclei of all living cells; consists of a protein bound to a nucleic acid | - |
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| olein | (noun) a naturally occurring glyceride of oleic acid that is found in fats and oils | Synonyms: triolein |
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| phenolphthalein | (noun) a laxative used in many preparations under various trade names; also used as an acid-base indicator in titrations involving weak acids and strong bases because it is brilliant red at high alkalinity and colorless below pH 8 | - |
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| phosphoprotein | (noun) containing chemically bound phosphoric acid | - |
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| protein | (noun) any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes | - |
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| rein | (noun) one of a pair of long straps (usually connected to the bit or the headpiece) used to control a horse | - |
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| (noun) any means of control | - |
| (verb) keep in check | Synonyms: harness, rule |
| (verb) stop or slow up one's horse or oneself by or as if by pulling the reins | Synonyms: rein in |
| (verb) stop or check by or as if by a pull at the reins | Synonyms: rein in |
| (verb) control and direct with or as if by reins | Synonyms: draw rein, harness, rein in |
| resorcinolphthalein | (noun) a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed) | Synonyms: fluorescein, fluoresceine, fluorescent dye |
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| scleroprotein | (noun) a simple protein found in horny and cartilaginous tissues and in the lens of the eye | Synonyms: albuminoid |
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| skein | (noun) coils of worsted yarn | - |
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| stein | (noun) a mug intended for serving beer | Synonyms: beer mug |
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| terreplein | (noun) level space where heavy guns can be mounted behind the parapet at the top of a rampart | - |
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| therein | (adverb) (formal) in or into that thing or place | Synonyms: in that, in this |
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| thyroprotein | (noun) a preparation made from iodinated protein and having an action similar to thyroxine | - |
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| triolein | (noun) a naturally occurring glyceride of oleic acid that is found in fats and oils | Synonyms: olein |
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| turnverein | (noun) a club of tumblers or gymnasts | - |
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| vein | (noun) one of the horny ribs that stiffen and support the wing of an insect | Synonyms: nervure |
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| (noun) a blood vessel that carries blood from the capillaries toward the heart | Synonyms: vena, venous blood vessel |
| (noun) a distinctive style or manner | - |
| (noun) a layer of ore between layers of rock | Synonyms: mineral vein |
| (noun) any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ | Synonyms: nervure |
| (verb) make a veinlike pattern | - |
| villein | (noun) (Middle Ages) a person who is bound to the land and owned by the feudal lord | Synonyms: helot, serf |
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