| aurochs | (noun) large recently extinct long-horned European wild ox; considered one of the ancestors of domestic cattle | Synonyms: Bos primigenius, urus |
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| (noun) European bison having a smaller and higher head than the North American bison | Synonyms: Bison bonasus, wisent |
| autochthon | (noun) the earliest known inhabitants of a region | - |
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| autochthony | (noun) nativeness by virtue of originating or occurring naturally (as in a particular place) | Synonyms: endemism, indigenousness |
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| bacteriochlorophyll | (noun) a substance in photosensitive bacteria that is related to but different from chlorophyll of higher plants | - |
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| biochemist | (noun) someone with special training in biochemistry | - |
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| biochemistry | (noun) the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry | - |
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| biochip | (noun) a microchip that uses tiny strands of DNA to latch onto and quickly recognize thousands of genes at a time; intended for use in a biological environment | - |
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| brachistochrone | (noun) a curve between two points along which a body can move under gravity in a shorter time than for any other curve. | - |
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| brioche | (noun) a light roll rich with eggs and butter and somewhat sweet | - |
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| brochette | (noun) a small spit or skewer | - |
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| brochure | (noun) a small book usually having a paper cover | Synonyms: booklet, folder, leaflet, pamphlet |
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| brooch | (noun) a decorative pin worn by women | Synonyms: breastpin, broach |
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| cabochon | (noun) a highly polished gem that is cut convexly but without facets | - |
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| caroche | (noun) a luxurious carriage suitable for nobility in the 16th and 17th century | - |
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| cephalochordate | (noun) fish-like animals having a notochord rather than a true spinal column | - |
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| clochard | (noun) a wanderer who has no established residence or visible means of support | Synonyms: drifter, floater, vagabond, vagrant |
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| cloche | (noun) a woman's close-fitting hat that resembles a helmet | - |
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| (noun) a low transparent cover put over young plants to protect them from cold | - |
| cochin | (noun) Asian breed of large fowl with dense plumage and feathered legs | Synonyms: cochin china |
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| cochineal | (noun) Mexican red scale insect that feeds on cacti; the source of a red dye | Synonyms: cochineal insect, Dactylopius coccus |
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| (noun) a red dyestuff consisting of dried bodies of female cochineal insects | - |
| cochlea | (noun) the snail-shaped tube (in the inner ear coiled around the modiolus) where sound vibrations are converted into nerve impulses by the organ of Corti | - |
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| costochondritis | (noun) inflammation at the junction of a rib and its cartilage | - |
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| crochet | (noun) needlework done by interlocking looped stitches with a hooked needle | Synonyms: crocheting |
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| crocheting | (noun) creating a garment of needlework | - |
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| (noun) needlework done by interlocking looped stitches with a hooked needle | Synonyms: crochet |
| cytochrome | (noun) (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration) | - |
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| deinocheirus | (noun) lightly built medium-sized theropod with long limbs and neck | - |
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| electrochemistry | (noun) branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions | - |
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| epoch | (noun) a period marked by distinctive character or reckoned from a fixed point or event | Synonyms: era |
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| (noun) a unit of geological time that is a subdivision of a period and is itself divided into ages | - |
| (noun) (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded | Synonyms: date of reference |
| femtochemistry | (noun) the branch of chemistry that studies elementary (often very fast) chemical reactions as they occur; the experimental methods are often based on the use of femtosecond laser pulses | - |
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| fluorochrome | (noun) any of various fluorescent substances used in fluorescence microscopy to stain specimens | - |
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| geochemistry | (noun) the chemistry of the earth's crust | - |
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| glochid | (noun) a barbed spine or bristle (often tufted on cacti) | Synonyms: glochidium |
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| glochidium | (noun) a barbed spine or bristle (often tufted on cacti) | Synonyms: glochid |
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| glottochronology | (noun) the determination of how long ago different languages evolved from a common source language | - |
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| guilloche | (noun) an architectural decoration formed by two intersecting wavy bands | - |
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| haematochezia | (noun) passage of stools containing blood (as from diverticulosis or colon cancer or peptic ulcer) | Synonyms: hematochezia |
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| hematochezia | (noun) passage of stools containing blood (as from diverticulosis or colon cancer or peptic ulcer) | Synonyms: haematochezia |
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| hematochrome | (noun) a reddish coloring material found in some algae | - |
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| hemochromatosis | (noun) pathology in which iron accumulates in the tissues; characterized by bronzed skin and enlarged liver and diabetes mellitus and abnormalities of the pancreas and the joints | Synonyms: bronzed diabetes, iron-storage disease, iron overload |
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| hooch | (noun) an illicitly distilled (and usually inferior) alcoholic liquor | Synonyms: hootch |
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| hydrochloride | (noun) a complex consisting of an organic base in association with hydrogen chloride | - |
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| hydrochlorofluorocarbon | (noun) a fluorocarbon that is replacing chlorofluorocarbon as a refrigerant and propellant in aerosol cans; considered to be somewhat less destructive to the atmosphere | Synonyms: HCFC |
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| hydrochlorothiazide | (noun) a diuretic drug (trade name Microzide, Esidrix, and HydroDIURIL) used in the treatment of hypertension | Synonyms: Esidrix, HydroDIURIL, Microzide |
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| hypochlorite | (noun) any salt or ester of hypochlorous acid | - |
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| hypochondria | (noun) chronic and abnormal anxiety about imaginary symptoms and ailments | Synonyms: hypochondriasis |
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| hypochondriac | (noun) a patient with imaginary symptoms and ailments | - |
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| hypochondriasis | (noun) chronic and abnormal anxiety about imaginary symptoms and ailments | Synonyms: hypochondria |
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| hypochondrium | (noun) the upper region of the abdomen just below the lowest ribs on either side of the epigastrium | - |
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| immunochemistry | (noun) the field of chemistry concerned with chemical processes in immunology (such as chemical studies of antigens and antibodies) | Synonyms: chemoimmunology |
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| immunohistochemistry | (noun) an assay that shows specific antigens in tissues by the use of markers that are either fluorescent dyes or enzymes (such as horseradish peroxidase) | - |
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| iodochlorhydroxyquin | (noun) drug used to treat certain fungal infection (as athlete's foot) | Synonyms: Clioquinol |
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| isochalaz | (noun) a line indicating a constant frequency of hail storms. | - |
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| isocheim | (noun) a line on a map connecting places with the same mean winter temperature. | - |
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| isochrone | (noun) an isogram connecting points at which something occurs or arrives at the same time | - |
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| isochronism | (noun) the property of occuring regularly at equal time intervals, of maintaining a constant period or interval, despite variations in other measurable factors in the same system. | - |
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| kinetochore | (noun) a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape | Synonyms: centromere |
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| lipochondrodystrophy | (noun) hereditary disease (autosomal recessive) consisting of an error is mucopolysaccharide metabolism; characterized by severe abnormalities in development of skeletal cartilage and bone and mental retardation | Synonyms: dysostosis multiplex, gargoylism, Hurler's disease, Hurler's syndrome |
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| loch | (noun) Scottish word for a lake | - |
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| (noun) a long narrow inlet of the sea in Scotland (especially when it is nearly landlocked) | - |
| lochia | (noun) substance discharged from the vagina (cellular debris and mucus and blood) that gradually decreases in amount during the weeks following childbirth | - |
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| masochism | (noun) sexual pleasure obtained from receiving punishment (physical or psychological) | - |
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| masochist | (noun) someone who obtains pleasure from receiving punishment | - |
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| microchip | (noun) electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circuit | Synonyms: chip, micro chip, microprocessor chip, silicon chip |
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| mishpocha | (noun) (Yiddish) the entire family network of relatives by blood or marriage (and sometimes close friends) | Synonyms: mishpachah |
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| mitochondrion | (noun) an organelle containing enzymes responsible for producing energy | Synonyms: chondriosome |
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| mocha | (noun) a dark brown color | - |
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| (noun) a superior dark coffee made from beans from Arabia | Synonyms: mocha coffee |
| (noun) a flavoring made from coffee mixed with chocolate | - |
| (noun) soft suede glove leather from goatskin | - |
| moloch | (noun) any lizard of the genus Moloch | - |
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| monochromacy | (noun) complete color blindness; colors can be differentiated only on the basis of brightness | Synonyms: monochromasy, monochromatic vision, monochromatism, monochromia |
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| monochromasy | (noun) complete color blindness; colors can be differentiated only on the basis of brightness | Synonyms: monochromacy, monochromatic vision, monochromatism, monochromia |
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| monochromat | (noun) a person who is completely color-blind | - |
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| monochromatism | (noun) complete color blindness; colors can be differentiated only on the basis of brightness | Synonyms: monochromacy, monochromasy, monochromatic vision, monochromia |
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| monochrome | (noun) a black-and-white photograph or slide | Synonyms: black and white |
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| (noun) painting done in a range of tones of a single color | - |
| monochromia | (noun) complete color blindness; colors can be differentiated only on the basis of brightness | Synonyms: monochromacy, monochromasy, monochromatic vision, monochromatism |
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| mooch | (noun) someone who mooches or cadges (tries to get something free) | Synonyms: cadger, moocher, scrounger |
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| moocher | (noun) someone who mooches or cadges (tries to get something free) | Synonyms: cadger, mooch, scrounger |
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| neurochemical | (noun) any organic substance that occurs in neural activity | - |
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| nitrochloroform | (noun) a heavy colorless insoluble liquid compound that causes tears and vomiting; used as a pesticide and as tear gas | Synonyms: chloropicrin |
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| nitrochloromethane | (noun) gaseous form of chloropicrin used as tear gas | - |
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| notochord | (noun) a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates | - |
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| ocher | (noun) a moderate yellow-orange to orange color | Synonyms: ochre |
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| (noun) any of various earths containing silica and alumina and ferric oxide; used as a pigment | Synonyms: ochre |
| ochlocracy | (noun) a political system in which a mob is the source of control; government by the masses | Synonyms: mobocracy |
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| ochre | (noun) a moderate yellow-orange to orange color | Synonyms: ocher |
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| (noun) any of various earths containing silica and alumina and ferric oxide; used as a pigment | Synonyms: ocher |
| ochronosis | (noun) an accumulation of dark pigment in cartilage and other connective tissue; usually a symptom of alkaptonuria or phenol poisoning | - |
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| oligochaete | (noun) hermaphroditic terrestrial and aquatic annelids having bristles borne singly along the length of the body | Synonyms: oligochaete worm |
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| orthochorea | (noun) a form of chorea in which spasms occur mainly when the patient is erect | - |
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| osteochondroma | (noun) benign tumor containing both bone and cartilage; usually occurs near the end of a long bone | - |
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| panocha | (noun) fudge made with brown sugar and butter and milk and nuts | Synonyms: panoche, penoche, penuche |
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| panoche | (noun) fudge made with brown sugar and butter and milk and nuts | Synonyms: panocha, penoche, penuche |
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| parochialism | (noun) a limitation of views or interests like that defined by a local parish | - |
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| penoche | (noun) fudge made with brown sugar and butter and milk and nuts | Synonyms: panocha, panoche, penuche |
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| petrochemical | (noun) any compound obtained from petroleum or natural gas | - |
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| phaeochromocytoma | (noun) a vascular tumor of the adrenal gland; hypersecretion of epinephrine results in intermittent or sustained hypertension | Synonyms: pheochromocytoma |
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| pheochromocytoma | (noun) a vascular tumor of the adrenal gland; hypersecretion of epinephrine results in intermittent or sustained hypertension | Synonyms: phaeochromocytoma |
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| photochemistry | (noun) branch of chemistry that deals with the chemical action of light | - |
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| phytochemical | (noun) a chemical substance obtained from plants that is biologically active but not nutritive | - |
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| phytochemist | (noun) a chemist who specializes in the chemistry of plants | - |
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| phytochemistry | (noun) the branch of organic chemistry dealing with the chemistry of plants | - |
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| pibroch | (noun) martial music with variations; to be played by bagpipes | - |
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| pinochle | (noun) a card game played with a pack of forty-eight cards (two of each suit for high cards); play resembles whist | Synonyms: bezique, penuchle, pinocle |
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| pleochroism | (noun) the phenomenon of different colors appearing when certain crystals are viewed from different directions | - |
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| pochard | (noun) heavy-bodied Old World diving duck having a grey-and-black body and reddish head | Synonyms: Aythya ferina |
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| pooch | (noun) informal terms for dogs | Synonyms: barker, bow-wow, doggie, doggy |
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