| acetophenetidin | (noun) a white crystalline compound used as an analgesic and also as an antipyretic | Synonyms: acetphenetidin, phenacetin |
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| chloroacetophenone | (noun) a tear gas that is weaker than CS gas but lasts longer | Synonyms: CN gas |
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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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| foetoprotein | (noun) any of several antigens that occur naturally in the fetus and sometimes in adults with cancer | Synonyms: fetoprotein |
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| foretop | (noun) a lock of a horse's mane that grows forward between the ears | Synonyms: forelock |
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| (noun) a platform at the head of a foremast | - |
| gametophore | (noun) a modified branch bearing gametangia as in the thalloid liverworts | - |
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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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| housetop | (noun) the roof of a house | - |
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| ketoprofen | (noun) nonsteroidal anti-inflammatory drug (trade names Orudis or Orudis KT or Oruvail) | Synonyms: Orudis, Orudis KT, Oruvail |
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| megagametophyte | (noun) the female gametophyte produced by the megaspore of a plant that produces both microspore and megaspores | - |
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| metopion | (noun) the craniometric point midway between the frontal eminences of the skull | - |
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| metoprolol | (noun) beta blocker (trade name Lopressor) used in treating hypertension and angina and arrhythmia and acute myocardial infarction; has adverse side effects (depression and exacerbation of congestive heart failure etc.) | Synonyms: Lopressor |
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| microgametophyte | (noun) the male gametophyte produced by a microspore | - |
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| tabletop | (noun) the top horizontal work surface of a table | - |
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| treetop | (noun) the upper branches and leaves of a tree or other plant | Synonyms: crown |
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