| angiosperm | (noun) plants having seeds in a closed ovary | Synonyms: flowering plant |
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| angiospermous | (adjective) of or related to or characteristic of plants that are angiosperms | - |
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| endosperm | (noun) nutritive tissue surrounding the embryo within seeds of flowering plants | - |
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| episperm | (noun) protective outer layer of seeds of flowering plants | Synonyms: seed coat, testa |
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| gymnosperm | (noun) plants of the class Gymnospermae having seeds not enclosed in an ovary | - |
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| gymnospermous | (adjective) relating to or characteristic of plants of the class Gymnospermae | - |
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| hypermarket | (noun) a huge supermarket (usually built on the outskirts of a town) | - |
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| hypermastigote | (noun) flagellate symbiotic in the intestines of e.g. termites | - |
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| hypermedia | (noun) a multimedia system in which related items of information are connected and can be presented together | Synonyms: hypermedia system, interactive multimedia, interactive multimedia system |
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| hypermenorrhea | (noun) abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged | Synonyms: menorrhagia |
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| hypermetropia | (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: farsightedness, hypermetropy, hyperopia, longsightedness |
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| hypermetropic | (adjective) abnormal ability to focus of distant objects | Synonyms: hyperopic |
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| hypermetropy | (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: farsightedness, hypermetropia, hyperopia, longsightedness |
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| hypermotility | (noun) excessive movement; especially excessive motility of the gastrointestinal tract | - |
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| impermanence | (noun) the property of not existing for indefinitely long durations | Synonyms: impermanency |
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| impermanency | (noun) the property of not existing for indefinitely long durations | Synonyms: impermanence |
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| impermanent | (adjective) not permanent; not lasting | Synonyms: temporary |
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| (adjective) existing or enduring for a limited time only | - |
| impermeability | (noun) the property of something that cannot be pervaded by a liquid | Synonyms: impermeableness |
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| impermeable | (adjective) preventing especially liquids to pass or diffuse through | - |
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| impermeableness | (noun) the property of something that cannot be pervaded by a liquid | Synonyms: impermeability |
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| impermissibility | (noun) inadmissibility as a consequence of not being permitted | - |
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| impermissible | (adjective) not permitted | - |
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| (adjective) not allowable | - |
| impermissibly | (adverb) not permissibly | - |
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| newspaperman | (noun) a male journalist employed to provide news stories for newspapers or broadcast media | Synonyms: pressman |
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| oligospermia | (noun) insufficient spermatozoa in the semen | - |
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| panspermia | (noun) The hypothesis that microorganisms may transmit life from outer space to habitable bodies; or the process of such transmission. | - |
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| papermaking | (noun) the craft of making paper | - |
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| peppermint | (noun) a candy flavored with peppermint oil | Synonyms: peppermint candy |
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| (noun) herb with downy leaves and small purple or white flowers that yields a pungent oil used as a flavoring | Synonyms: Mentha piperita |
| (noun) red gum tree of Tasmania | Synonyms: Eucalyptus amygdalina, peppermint gum, red gum |
| perisperm | (noun) the nutritive tissue outside the sac containing the embryo in some seeds | - |
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| perm | (noun) a series of waves in the hair made by applying heat and chemicals | Synonyms: permanent, permanent wave |
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| (verb) give a permanent wave to | - |
| permafrost | (noun) ground that is permanently frozen | - |
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| permanence | (noun) the property of being able to exist for an indefinite duration | Synonyms: permanency |
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| permanency | (noun) the property of being able to exist for an indefinite duration | Synonyms: permanence |
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| permanent | (adjective) continuing or enduring without marked change in status or condition or place | Synonyms: lasting |
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| (adjective) not capable of being reversed or returned to the original condition | - |
| (noun) a series of waves in the hair made by applying heat and chemicals | Synonyms: perm, permanent wave |
| permanently | (adverb) for a long time without essential change | Synonyms: for good |
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| permanganate | (noun) a dark purple salt of permanganic acid; in water solution it is used as a disinfectant and antiseptic | - |
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| permeability | (noun) the property of something that can be pervaded by a liquid (as by osmosis or diffusion) | Synonyms: permeableness |
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| permeable | (adjective) allowing fluids or gases to pass or diffuse through | - |
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| permeableness | (noun) the property of something that can be pervaded by a liquid (as by osmosis or diffusion) | Synonyms: permeability |
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| permeant | (adjective) spreading or spread throughout | Synonyms: permeating, permeative, pervasive |
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| permeate | (verb) pass through | Synonyms: filter, percolate, sink in |
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| (verb) spread or diffuse through | Synonyms: diffuse, imbue, interpenetrate, penetrate, pervade, riddle |
| (verb) penetrate mutually or be interlocked | Synonyms: interpenetrate |
| permeating | (adjective) spreading or spread throughout | Synonyms: permeant, permeative, pervasive |
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| permeation | (noun) mutual penetration; diffusion of each through the other | Synonyms: interpenetration |
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| (noun) the process of permeating or infusing something with a substance | Synonyms: pervasion, suffusion |
| permeative | (adjective) spreading or spread throughout | Synonyms: permeant, permeating, pervasive |
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| permed | (adjective) (of hair) styled with permanent waves | - |
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| permissibility | (noun) admissibility as a consequence of being permitted | - |
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| permissible | (adjective) that may be permitted especially as according to rule | Synonyms: allowable |
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| (adjective) that may be accepted or conceded | - |
| permissibly | (adverb) in a permissible manner | Synonyms: allowably |
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| permission | (noun) the act of giving a formal (usually written) authorization | Synonyms: license, permit |
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| (noun) approval to do something | - |
| permissive | (adjective) granting or inclined or able to grant permission; not strict in discipline | - |
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| (adjective) not preventive | - |
| permissively | (adverb) in a permissive manner | - |
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| permissiveness | (noun) a disposition to allow freedom of choice and behavior | Synonyms: tolerance |
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| permissivism | (noun) lenience toward or indulgence of a wide variety of social behavior. | - |
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| permit | (noun) the act of giving a formal (usually written) authorization | Synonyms: license, permission |
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| (noun) large game fish; found in waters of the West Indies | Synonyms: Trachinotus falcatus |
| (noun) a legal document giving official permission to do something | Synonyms: licence, license |
| (verb) consent to, give permission; permit | Synonyms: allow, countenance, let |
| (verb) allow the presence of or allow (an activity) without opposing or prohibiting | Synonyms: allow, tolerate |
| (verb) make it possible through a specific action or lack of action for something to happen | Synonyms: allow, let |
| permutability | (noun) ability to change sequence | Synonyms: permutableness, transposability |
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| permutable | (adjective) capable of changing sequence | Synonyms: transposable |
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| permutableness | (noun) ability to change sequence | Synonyms: permutability, transposability |
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| permutation | (noun) complete change in character or condition | - |
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| (noun) the act of changing the arrangement of a given number of elements | - |
| (noun) act of changing the lineal order of objects in a group | - |
| (noun) an event in which one thing is substituted for another | Synonyms: replacement, substitution, switch, transposition |
| permute | (verb) change the order or arrangement of | Synonyms: commute, transpose |
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| progymnosperm | (noun) an ancestral fossil type from which modern gymnosperms are thought to have derived | - |
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| pteridosperm | (noun) an extinct seed-producing fernlike plant of the order Cycadofilicales (or group Pteridospermae) | Synonyms: seed fern |
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| semipermanent | (adjective) relating to or extending over a relatively long time | Synonyms: long-run, long-term |
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| semipermeable | (adjective) (of a membrane) selectively permeable | - |
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| sperm | (noun) the male reproductive cell; the male gamete | Synonyms: sperm cell, spermatozoan, spermatozoon |
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| spermaceti | (noun) a white waxy substance from oil of the sperm whale | - |
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| spermatic | (adjective) consisting of or resembling spermatozoa | Synonyms: spermous |
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| spermatid | (noun) an immature gamete produced by a spermatocyte; develops into a spermatozoon | - |
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| spermatocele | (noun) a swelling on the epididymis or the testis; usually contains spermatozoa | - |
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| spermatocide | (noun) a contraceptive agent that kills spermatozoa | Synonyms: spermicide |
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| spermatocyte | (noun) a male gametocyte that develops into four spermatids | - |
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| spermatogenesis | (noun) development of spermatozoa | - |
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| spermatophyte | (noun) plant that reproduces by means of seeds not spores | Synonyms: phanerogam, seed plant |
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| spermatozoan | (noun) the male reproductive cell; the male gamete | Synonyms: sperm, sperm cell, spermatozoon |
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| spermatozoid | (noun) a motile male gamete of a plant such as an alga or fern or gymnosperm | Synonyms: antherozoid |
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| spermatozoon | (noun) the male reproductive cell; the male gamete | Synonyms: sperm, sperm cell, spermatozoan |
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| spermicidal | (adjective) destructive to spermatozoa | - |
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| spermicide | (noun) a contraceptive agent that kills spermatozoa | Synonyms: spermatocide |
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| spermophile | (noun) any of various terrestrial burrowing rodents of Old and New Worlds; often destroy crops | Synonyms: gopher, ground squirrel |
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| spermous | (adjective) consisting of or resembling spermatozoa | Synonyms: spermatic |
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| superman | (noun) street name for lysergic acid diethylamide | Synonyms: acid, back breaker, battery-acid, dose, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, window pane, Zen |
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| (noun) a person with great powers and abilities | Synonyms: demigod, Ubermensch |
| supermarket | (noun) a large self-service grocery store selling groceries and dairy products and household goods | - |
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| supermarketeer | (noun) an operator of a supermarket | Synonyms: supermarketer |
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| supermarketer | (noun) an operator of a supermarket | Synonyms: supermarketeer |
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| supermodel | (noun) a fashion model who has attained the status of a celebrity | - |
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| supermolecule | (noun) any very large complex molecule; found only in plants and animals | Synonyms: macromolecule |
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| supermom | (noun) an informal term for a mother who can combine childcare and full-time employment | - |
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| unpermed | (adjective) not having had a permanent wave | - |
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| unpermissive | (adjective) not inclined to grant permission; severe in discipline | - |
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| unpermissiveness | (noun) a lack of permissiveness or indulgence and a tendency to confine behavior within certain specified limits | Synonyms: restrictiveness |
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| uppermost | (adjective) at or nearest to the top | Synonyms: topmost, upmost |
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| (adverb) in or into the highest position | - |
| (adverb) in or into the most prominent position, as in the mind | - |