| acetyl | (noun) the organic group of acetic acid (CH3CO-) | Synonyms: acetyl group, acetyl radical, ethanoyl group, ethanoyl radical |
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| acetylation | (noun) the process of introducing an acetyl group into a compound | - |
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| acetylcholine | (noun) a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems | - |
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| acetylene | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: alkyne, ethyne |
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| achylia | (noun) absence of gastric juices (partial or complete) | Synonyms: achylia gastrica |
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| acrylamide | (noun) a white crystalline amide of propenoic acid can damage the nervous system and is carcinogenic in laboratory animals | - |
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| acrylate | (noun) a salt or ester of propenoic acid | Synonyms: propenoate |
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| acrylic | (noun) a synthetic fabric made from polyacrylonitrile | - |
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| (noun) used especially by artists | Synonyms: acrylic paint |
| (noun) a glassy thermoplastic; can be cast and molded or used in coatings and adhesives | Synonyms: acrylate resin, acrylic resin |
| (noun) polymerized from acrylonitrile | Synonyms: acrylic fiber |
| acrylonitrile | (noun) a colorless liquid unsaturated nitrile made from propene | Synonyms: propenonitrile, vinyl cyanide |
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| acyl | (noun) any group or radical of the form RCO- where R is an organic group | Synonyms: acyl group |
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| acylation | (noun) the process of introducing an acyl group into a compound | - |
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| acylglycerol | (noun) an ester of glycerol and fatty acids that occurs naturally as fats and fatty oils | Synonyms: glyceride |
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| adactylia | (noun) congenital absence of fingers and/or toes | Synonyms: adactylism, adactyly |
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| adactylism | (noun) congenital absence of fingers and/or toes | Synonyms: adactylia, adactyly |
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| adactyly | (noun) congenital absence of fingers and/or toes | Synonyms: adactylia, adactylism |
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| alkyl | (noun) any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons | Synonyms: alkyl group, alkyl radical |
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| alkylbenzene | (noun) organic compound that has an alkyl group bound to a benzene ring | - |
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| alkylbenzenesulfonate | (noun) sulfonate of alkyl benzene | - |
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| allyl | (noun) the univalent unsaturated organic radical C3H5; derived from propylene | Synonyms: allyl group, allyl radical |
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| amaryllis | (noun) bulbous plant having showy white to reddish flowers | - |
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| aminophylline | (noun) a theophylline derivative that is used as a bronchodilator in the treatment of bronchial asthma, emphysema, and bronchitis | - |
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| amitriptyline | (noun) a tricyclic antidepressant drug (trade name Elavil) with serious side effects; interacts with many other medications | Synonyms: amitriptyline hydrochloride, Elavil |
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| amyl | (noun) a hydrocarbon radical that occurs in many organic compounds | - |
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| amylase | (noun) any of a group of proteins found in saliva and pancreatic juice and parts of plants; help convert starch to sugar | - |
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| amyloid | (noun) (pathology) a waxy translucent complex protein resembling starch that results from degeneration of tissue | - |
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| (noun) a non-nitrogenous food substance consisting chiefly of starch; any substance resembling starch | - |
| amyloidosis | (noun) a disorder characterized by deposit of amyloid in organs or tissues; often secondary to chronic rheumatoid arthritis or tuberculosis or multiple myeloma | - |
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| amylolysis | (noun) conversion of starch to sugar | - |
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| amylum | (noun) a complex carbohydrate found chiefly in seeds, fruits, tubers, roots and stem pith of plants, notably in corn, potatoes, wheat, and rice; an important foodstuff and used otherwise especially in adhesives and as fillers and stiffeners for paper and textiles | Synonyms: starch |
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| anaphylaxis | (noun) hypersensitivity reaction to the ingestion or injection of a substance (a protein or drug) resulting from prior contact with a substance | - |
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| anastylosis | (noun) the archeological reassembly of ruined monuments from fallen or decayed fragments (incorporating new materials when necessary) | - |
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| anchylosis | (noun) abnormal adhesion and rigidity of the bones of a joint | Synonyms: ankylosis |
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| anesthyl | (noun) a mixture of methyl and ethyl chloride; sprayed on as a local anesthetic | - |
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| ankyloglossia | (noun) a congenital anomaly in which the mucous membrane under the tongue is too short limiting the mobility of the tongue | Synonyms: tongue tie |
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| ankylosaur | (noun) having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's | Synonyms: ankylosaurus |
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| ankylosaurus | (noun) having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's | Synonyms: ankylosaur |
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| ankylosis | (noun) abnormal adhesion and rigidity of the bones of a joint | Synonyms: anchylosis |
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| anthophyllite | (noun) a dark brown mineral of the amphibole group; magnesium iron silicate | - |
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| argyle | (noun) a sock knitted or woven with an argyle design | Synonyms: argyll |
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| (noun) a design consisting of a pattern of varicolored diamonds on a solid background (originally for knitted articles); patterned after the tartan of a clan in western Scotland | Synonyms: argyll |
| (noun) a covered gravy holder of silver or other metal containing a detachable central vessel for hot water to keep the gravy warm | Synonyms: argyll |
| argyll | (noun) a sock knitted or woven with an argyle design | Synonyms: argyle |
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| (noun) a design consisting of a pattern of varicolored diamonds on a solid background (originally for knitted articles); patterned after the tartan of a clan in western Scotland | Synonyms: argyle |
| (noun) a covered gravy holder of silver or other metal containing a detachable central vessel for hot water to keep the gravy warm | Synonyms: argyle |
| artiodactyl | (noun) placental mammal having hooves with an even number of functional toes on each foot | Synonyms: artiodactyl mammal, even-toed ungulate |
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| asylum | (noun) a hospital for mentally incompetent or unbalanced person | Synonyms: insane asylum, institution, mental home, mental hospital, mental institution, psychiatric hospital |
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| (noun) a shelter from danger or hardship | Synonyms: refuge, sanctuary |
| bacteriochlorophyll | (noun) a substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants | - |
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| bandyleg | (noun) a leg bowed outward at the knee (or below the knee) | Synonyms: bandy leg, bow leg, bowleg, genu varum, tibia vara |
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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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| beryl | (noun) the chief source of beryllium; colored transparent varieties are valued as gems | - |
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| beryllium | (noun) a light strong brittle grey toxic bivalent metallic element | Synonyms: atomic number 4, Be, glucinium |
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| brachydactylia | (noun) abnormal shortness of fingers and toes | Synonyms: brachydactyly |
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| brachydactyly | (noun) abnormal shortness of fingers and toes | Synonyms: brachydactylia |
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| butyl | (noun) a hydrocarbon radical (C4H9) | - |
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| butylene | (noun) any of three isomeric hydrocarbons C4H8; all used in making synthetic rubbers | Synonyms: butene |
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| bylaw | (noun) a rule adopted by an organization in order to regulate its own affairs and the behavior of its members | - |
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| cacodyl | (noun) the univalent group derived from arsine | Synonyms: arsenic group, cacodyl group, cacodyl radical |
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| (noun) a poisonous oily liquid with a garlicky odor composed of 2 cacodyl groups; undergoes spontaneous combustion in dry air | Synonyms: tetramethyldiarsine |
| carbonyl | (noun) a compound containing metal combined with carbon monoxide | - |
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| carboxyl | (noun) the univalent radical -COOH; present in and characteristic of organic acids | Synonyms: carboxyl group |
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| cataphyll | (noun) a reduced or scarcely developed leaf at the start of a plant's life (i.e., cotyledons) or in the early stages of leaf development | - |
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| ceylonite | (noun) a dark-colored spinel containing iron | Synonyms: pleonaste |
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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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| chlorophyl | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyll |
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| chlorophyll | (noun) any of a group of green pigments found in photosynthetic organisms; there are four naturally occurring forms | Synonyms: chlorophyl |
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| chrysoberyl | (noun) a rare hard yellow green mineral consisting of beryllium aluminate in crystal form; used as a gemstone | - |
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| chyle | (noun) a milky fluid consisting of lymph and emulsified fats; formed in the small intestine during digestion of ingested fats | - |
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| chyloderma | (noun) swelling of the scrotum resulting from chronic lymphatic obstruction | Synonyms: elephantiasis scroti |
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| chylomicron | (noun) a microscopic particle of triglycerides produced in the intestines during digestion; in the bloodstream they release their fatty acids into the blood | - |
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| cladophyll | (noun) a flattened stem resembling and functioning as a leaf | Synonyms: cladode, phylloclad, phylloclade |
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| clinodactyly | (noun) a congenital defect in which one or more toes or fingers are abnormally positioned | - |
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| cocarboxylase | (noun) a coenzyme important in respiration in the Krebs cycle | Synonyms: thiamine pyrophosphate |
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| condyle | (noun) a round bump on a bone where it forms a joint with another bone | - |
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| condylion | (noun) the craniometric point at the tip of the mandibular condyle | - |
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| cotyledon | (noun) embryonic leaf in seed-bearing plants | Synonyms: seed leaf |
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| cyclostyle | (noun) a writing implement with a small toothed wheel that cuts small holes in a stencil | - |
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| cylinder | (noun) a cylindrical container for oxygen or compressed air | - |
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| (noun) a chamber within which piston moves | Synonyms: piston chamber |
| (noun) a surface generated by rotating a parallel line around a fixed line | - |
| (noun) a solid bounded by a cylindrical surface and two parallel planes (the bases) | - |
| cylindricality | (noun) the roundness of a 3-dimensional cylinder | Synonyms: cylindricalness |
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| cylindricalness | (noun) the roundness of a 3-dimensional cylinder | Synonyms: cylindricality |
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| cylix | (noun) a shallow drinking cup with two handles; used in ancient Greece | Synonyms: kylix |
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| dactyl | (noun) a finger or toe in human beings or corresponding body part in other vertebrates | Synonyms: digit |
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| (noun) a metrical unit with stressed-unstressed-unstressed syllables | - |
| dactylomegaly | (noun) abnormally large fingers or toes | - |
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| daktylos | (noun) a Greek unit of length equal to one centimeter. | - |
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| daylight | (noun) light during the daytime | - |
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| (noun) the time after sunrise and before sunset while it is light outside | Synonyms: day, daytime |
| daylily | (noun) any of numerous perennials having tuberous roots and long narrow bladelike leaves and usually yellow lily-like flowers that bloom for only a day | Synonyms: day lily |
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| decarboxylase | (noun) any of the enzymes that hydrolize the carboxyl group | - |
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| decarboxylation | (noun) the process of removing a carboxyl group from a chemical compound (usually replacing it with hydrogen) | - |
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| decasyllable | (noun) a verse line having ten syllables | - |
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| diacetylmorphine | (noun) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush | Synonyms: heroin |
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| dichlorodiphenyltrichloroethane | (noun) an insecticide that is also toxic to animals and humans; banned in the United States since 1972 | Synonyms: DDT |
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| dicotyledon | (noun) flowering plant with two cotyledons; the stem grows by deposit on its outside | Synonyms: dicot, exogen, magnoliopsid |
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| dictostylium | (noun) any slime mold of the genus Dictostylium | - |
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| diethylmalonylurea | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, barbitone, diethylbarbituric acid, veronal |
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| diethylstilbesterol | (noun) synthetic nonsteroid with the properties of estrogen; formerly used to treat menstrual problems but was found to be associated with vaginal cancers in the daughters of women so treated during pregnancy | Synonyms: DES, stilbesterol |
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| diethylstilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilboestrol, stilbestrol, stilboestrol |
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| diethylstilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, stilbestrol, stilboestrol |
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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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| dimethylglyoxime | (noun) a compound used in analysis as a precipitant for palladium or nickel | - |
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| diphenylhydantoin | (noun) an anticonvulsant drug (trade name Dilantin) used to treat epilepsy and that is not a sedative | Synonyms: Dilantin, phenytoin |
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| dissyllable | (noun) a word having two syllables | Synonyms: disyllable |
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| disyllable | (noun) a word having two syllables | Synonyms: dissyllable |
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| doyley | (noun) a small round piece of linen placed under a dish or bowl | Synonyms: doily, doyly |
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| doyly | (noun) a small round piece of linen placed under a dish or bowl | Synonyms: doily, doyley |
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| ectrodactyly | (noun) congenital abnormality involving the absence of some fingers or toes | - |
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| epicondyle | (noun) a projection on a bone above a condyle serving for the attachment of muscles and ligaments | - |
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