| emphysematous | (adjective) relating to or resembling or being emphysema | - |
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| encephalography | (noun) roentgenography of the brain after spinal fluid has been replaced by a gas (usually oxygen); produces an encephalogram | - |
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| encephalopathy | (noun) any disorder or disease of the brain | Synonyms: brain disease, brain disorder |
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| endomorphy | (noun) round, fat, and heavy | Synonyms: pyknic type |
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| entelechy | (noun) (Aristotle) the state of something that is fully realized; actuality as opposed to potentiality | - |
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| enteropathy | (noun) a disease of the intestinal tract | - |
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| eparchy | (noun) a diocese of the Eastern Orthodox Church | Synonyms: exarchate |
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| (noun) a province in ancient Greece | - |
| epigraphy | (noun) the study of ancient inscriptions | - |
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| epiphyllum | (noun) any cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers | Synonyms: orchid cactus |
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| epiphyseal | (adjective) relating to the epiphysis of a bone | Synonyms: epiphysial |
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| epiphysial | (adjective) relating to the epiphysis of a bone | Synonyms: epiphyseal |
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| epiphysis | (noun) the end of a long bone; initially separated from the main bone by a layer of cartilage that eventually ossifies so the parts become fused | - |
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| (noun) a small endocrine gland in the brain; situated beneath the back part of the corpus callosum; secretes melatonin | Synonyms: epiphysis cerebri, pineal body, pineal gland |
| epiphyte | (noun) plant that derives moisture and nutrients from the air and rain; usually grows on another plant but not parasitic on it | Synonyms: aerophyte, air plant, epiphytic plant |
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| epiphytic | (adjective) of or relating to epiphytes | - |
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| epiphytotic | (adjective) (of plants) epidemic among plants of a single kind especially over a wide area | - |
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| ethnography | (noun) the branch of anthropology that provides scientific description of individual human societies | Synonyms: descriptive anthropology |
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| ethyl | (noun) the univalent hydrocarbon radical C2H5 derived from ethane by the removal of one hydrogen atom | Synonyms: ethyl group, ethyl radical |
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| ethylene | (noun) a flammable colorless gaseous alkene; obtained from petroleum and natural gas and used in manufacturing many other chemicals; sometimes used as an anesthetic | Synonyms: ethene |
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| ethyne | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: acetylene, alkyne |
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| euglenophyte | (noun) marine and freshwater green or colorless flagellate organism | Synonyms: euglenid, euglenoid |
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| eurhythmics | (noun) the interpretation in harmonious bodily movements of the rhythm of musical compositions; used to teach musical understanding | Synonyms: eurhythmy, eurythmics, eurythmy |
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| eurhythmy | (noun) the interpretation in harmonious bodily movements of the rhythm of musical compositions; used to teach musical understanding | Synonyms: eurhythmics, eurythmics, eurythmy |
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| filthy | (adjective) disgustingly dirty; filled or smeared with offensive matter | Synonyms: foul, nasty |
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| (adjective) characterized by obscenity | Synonyms: cruddy, foul, nasty, smutty |
| (adjective) vile; despicable | Synonyms: dirty, lousy |
| fishy | (adjective) of or relating to or resembling fish | - |
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| (adjective) not as expected | Synonyms: funny, shady, suspect, suspicious |
| flashy | (adjective) (used especially of clothes) marked by conspicuous display | Synonyms: gaudy, jazzy, showy, sporty |
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| (adjective) tastelessly showy | Synonyms: brassy, cheap, flash, garish, gaudy, gimcrack, loud, meretricious, tacky, tatty, tawdry, trashy |
| fleshy | (adjective) of or relating to or resembling flesh | Synonyms: sarcoid |
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| (adjective) usually describes a large person who is fat but has a large frame to carry it | Synonyms: heavy, overweight |
| formaldehyde | (noun) a colorless poisonous gas; made by the oxidation of methanol | Synonyms: methanal |
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| frothy | (adjective) emitting or filled with bubbles as from carbonation or fermentation | Synonyms: bubbling, bubbly, effervescing, foaming, foamy, spumy |
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| (adjective) marked by high spirits or excitement | Synonyms: bubbling, effervescent, scintillating, sparkly |
| furfuraldehyde | (noun) a liquid aldehyde with a penetrating odor; made from plant hulls and corncobs; used in making furan and as a solvent | Synonyms: furfural |
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| gametophyte | (noun) the gamete-bearing individual or phase in the life cycle of a plant having alternation of generations | - |
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| gammopathy | (noun) a disturbance in the synthesis of immunoglobulins; proteins having antibody activity increase greatly in the blood | - |
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| geography | (noun) study of the earth's surface; includes people's responses to topography and climate and soil and vegetation | Synonyms: geographics |
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| geophysical | (adjective) of or concerned with geophysics | - |
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| geophysicist | (noun) a geologist who uses physical principles to study the properties of the earth | - |
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| geophysics | (noun) geology that uses physical principles to study properties of the earth | Synonyms: geophysical science |
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| geophyte | (noun) a perennial plant that propagates by underground bulbs or tubers or corms | - |
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| geophytic | (adjective) of or relating to geophytes | - |
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| glyceraldehyde | (noun) a sweet crystalline aldehyde formed by the breakdown of sugars | Synonyms: glyceric aldehyde |
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| glyptography | (noun) carving or engraving (especially on stones) | - |
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| (noun) carvings or engravings (especially on precious stones) | Synonyms: glyptic art |
| grouchy | (adjective) annoyed and irritable | Synonyms: bad-tempered, crabbed, crabby, cross, fussy, grumpy, ill-tempered |
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| gushy | (adjective) extravagantly demonstrative | Synonyms: effusive, gushing |
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| gymnosophy | (noun) the doctrine of a sect of Hindu philosophers who practiced nudity and asceticism and meditation | - |
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| gynarchy | (noun) a political system governed by a woman | Synonyms: gynecocracy |
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| haemoglobinopathy | (noun) a blood disease characterized by the presence of abnormal hemoglobins in the blood | Synonyms: hemoglobinopathy |
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| hagiography | (noun) a biography that idealizes or idolizes the person (especially a person who is a saint) | - |
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| halophyte | (noun) plant growing naturally in very salty soil | - |
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| healthy | (adjective) having or indicating good health in body or mind; free from infirmity or disease | - |
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| (adjective) large in amount or extent or degree | Synonyms: goodish, goodly, hefty, respectable, sizable, sizeable, tidy |
| (adjective) exercising or showing good judgment | Synonyms: intelligent, level-headed, levelheaded, sound |
| (adjective) financially secure and functioning well | - |
| (adjective) promoting health; healthful | Synonyms: good for you, salubrious |
| hemiepiphyte | (noun) a plant that is an epiphyte for part of its life | Synonyms: semiepiphyte |
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| hemoglobinopathy | (noun) a blood disease characterized by the presence of abnormal hemoglobins in the blood | Synonyms: haemoglobinopathy |
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| hierarchy | (noun) a series of ordered groupings of people or things within a system | - |
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| (noun) the organization of people at different ranks in an administrative body | Synonyms: pecking order, power structure |
| historiography | (noun) the writing of history | - |
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| (noun) a body of historical literature | - |
| holography | (noun) the branch of optics that deals with the use of coherent light from a laser in order to make a hologram that can then be used to create a three-dimensional image | - |
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| holophyte | (noun) an organism that produces its own food by photosynthesis | - |
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| holophytic | (adjective) obtaining nourishment as green plants do | - |
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| homeopathy | (noun) a method of treating disease with small amounts of remedies that, in large amounts in healthy people, produce symptoms similar to those being treated | Synonyms: homoeopathy |
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| homoeopathy | (noun) a method of treating disease with small amounts of remedies that, in large amounts in healthy people, produce symptoms similar to those being treated | Synonyms: homeopathy |
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| homomorphy | (noun) similarity of form | Synonyms: homomorphism |
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| hyacinth | (noun) any of numerous bulbous perennial herbs | - |
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| (noun) a red transparent variety of zircon used as a gemstone | Synonyms: jacinth |
| hyaena | (noun) doglike nocturnal mammal of Africa and southern Asia that feeds chiefly on carrion | Synonyms: hyena |
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| hyalin | (noun) a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions | Synonyms: hyaline |
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| hyaline | (adjective) resembling glass in transparency or translucency | Synonyms: hyaloid |
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| (noun) a glassy translucent substance that occurs in hyaline cartilage or in certain skin conditions | Synonyms: hyalin |
| hyalinisation | (noun) the state of being hyaline or having become hyaline | Synonyms: hyalinization |
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| hyalinization | (noun) the state of being hyaline or having become hyaline | Synonyms: hyalinisation |
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| hyaloid | (adjective) resembling glass in transparency or translucency | Synonyms: hyaline |
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| (noun) the transparent membrane enveloping the vitreous humor of the eye and separating it from the retina | Synonyms: hyaloid membrane |
| hyaloplasm | (noun) the clear nongranular portion of the cytoplasm of a cell | Synonyms: ground substance |
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| hyaloplasmic | (adjective) of or relating to hyaloplasm | - |
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| hyaluronidase | (noun) an enzyme (trade name Hyazyme) that splits hyaluronic acid and so lowers its viscosity and increases the permeability of connective tissue and the absorption of fluids | Synonyms: Hyazyme, spreading factor |
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| hybrid | (adjective) produced by crossbreeding | Synonyms: intercrossed |
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| (noun) (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species | Synonyms: cross, crossbreed |
| (noun) a car which runs on two power sources, usually an internal combustion engine and an electronic motor | Synonyms: hybrid car |
| (noun) a composite of mixed origin | - |
| (noun) a word that is composed of parts from different languages (e.g., `monolingual' has a Greek prefix and a Latin root) | Synonyms: loan-blend, loanblend |
| hybridisation | (noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | Synonyms: cross, crossbreeding, crossing, hybridization, hybridizing, interbreeding |
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| hybridise | (verb) breed animals or plants using parents of different races and varieties | Synonyms: cross, crossbreed, hybridize, interbreed |
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| hybridization | (noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | Synonyms: cross, crossbreeding, crossing, hybridisation, hybridizing, interbreeding |
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| hybridize | (verb) breed animals or plants using parents of different races and varieties | Synonyms: cross, crossbreed, hybridise, interbreed |
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| hybridizing | (noun) (genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | Synonyms: cross, crossbreeding, crossing, hybridisation, hybridization, interbreeding |
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| hybridoma | (noun) a hybrid cell resulting from the fusion of a lymphocyte and a tumor cell; used to culture a specific monoclonal antibody | - |
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| hydantoin | (noun) any of a group of anticonvulsant drugs used in treating epilepsy | - |
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| hydathode | (noun) a pore that exudes water on the surface or margin of a leaf of higher plants | Synonyms: water pore, water stoma |
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| hydatid | (noun) cyst filled with liquid; forms as a result of infestation by tapeworm larvae (as in echinococcosis) | - |
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| hydatidosis | (noun) infestation with larval echinococci (tapeworms) | Synonyms: echinococcosis, hydatid disease |
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| hydra | (noun) small tubular solitary freshwater hydrozoan polyp | - |
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| (noun) trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality | - |
| hydralazine | (noun) an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure | Synonyms: Apresoline |
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| hydramnios | (noun) an abnormality of pregnancy; accumulation of excess amniotic fluid | - |
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| hydrangea | (noun) any of various deciduous or evergreen shrubs of the genus Hydrangea | - |
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| hydrant | (noun) a discharge pipe with a valve and spout at which water may be drawn from the mains of waterworks | - |
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| (noun) a faucet for drawing water from a pipe or cask | Synonyms: tap, water faucet, water tap |
| hydrargyrum | (noun) a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures | Synonyms: atomic number 80, Hg, mercury, quicksilver |
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| hydrarthrosis | (noun) inflammation and swelling of a movable joint because of excess synovial fluid | - |
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| hydrate | (noun) any compound that contains water of crystallization | - |
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| (verb) cause to be hydrated; add water or moisture to | - |
| (verb) become hydrated and combine with water | - |
| (verb) supply water or liquid to in order to maintain a healthy balance | - |
| hydrated | (adjective) containing combined water (especially water of crystallization as in a hydrate) | Synonyms: hydrous |
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| hydration | (noun) the process of combining with water; usually reversible | - |
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| hydraulic | (adjective) of or relating to the study of hydraulics | - |
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| (adjective) moved or operated or effected by liquid (water or oil) | - |
| hydraulically | (adverb) in a hydraulic manner | Synonyms: hydraulicly |
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| hydraulicly | (adverb) in a hydraulic manner | Synonyms: hydraulically |
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| hydraulics | (noun) study of the mechanics of fluids | Synonyms: fluid mechanics |
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| hydrazide | (noun) any of a class of organic compounds sharing a common functional group characterized by a nitrogen to nitrogen covalent bond with 4 substituents with at least one of them being an acyl group. | - |
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| hydrazine | (noun) a colorless fuming corrosive liquid; a powerful reducing agent; used chiefly in rocket fuels | - |
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| hydrazoite | (noun) a salt of hydrazoic acid | - |
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| hydremia | (noun) blood disorder in which there is excess fluid volume compared with the cell volume of the blood | - |
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| hydric | (adjective) having or characterized by excessive moisture | - |
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| hydride | (noun) any binary compound formed by the union of hydrogen and other elements | - |
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| hydrilla | (noun) submersed plant with whorled lanceolate leaves and solitary axillary flowers; Old World plant naturalized in southern United States and clogging Florida's waterways | Synonyms: Hydrilla verticillata |
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| hydrocarbon | (noun) an organic compound containing only carbon and hydrogen | - |
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