| antipyresis | (noun) medication with antipyretics to treat a fever | - |
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| antipyretic | (noun) any medicine that lowers body temperature to prevent or alleviate fever | Synonyms: febrifuge |
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| byre | (noun) a barn for cows | Synonyms: cow barn, cowbarn, cowhouse, cowshed |
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| copyreader | (noun) an editor who prepares text for publication | Synonyms: copy editor, text editor |
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| empyrean | (noun) the apparent surface of the imaginary sphere on which celestial bodies appear to be projected | Synonyms: celestial sphere, firmament, heavens, sphere, vault of heaven, welkin |
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| gyre | (noun) a round shape formed by a series of concentric circles (as formed by leaves or flower petals) | Synonyms: coil, curl, curlicue, ringlet, roll, scroll, whorl |
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| hyperpyrexia | (noun) extremely high fever (especially in children) | - |
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| lyre | (noun) a harp used by ancient Greeks for accompaniment | - |
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| lyrebird | (noun) Australian bird that resembles a pheasant; the courting male displays long tail feathers in a lyre shape | - |
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| lyreflower | (noun) garden plant having deep-pink drooping heart-shaped flowers | Synonyms: bleeding heart, Dicentra spectabilis, lyre-flower |
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| polystyrene | (noun) a polymer of styrene; a rigid transparent thermoplastic | - |
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| pyre | (noun) wood heaped for burning a dead body as a funeral rite | Synonyms: funeral pyre |
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| pyrectic | (noun) any substance that can cause a rise in body temperature | Synonyms: pyrogen |
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| pyrene | (noun) the small hard nutlet of a drupe or drupelet; the seed and the hard endocarp that surrounds it | - |
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| (noun) a pale yellow crystalline hydrocarbon C16H10 extracted from coal tar | - |
| pyrethrum | (noun) spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum | Synonyms: Chrysanthemum coccineum, painted daisy, Tanacetum coccineum |
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| (noun) white-flowered pyrethrum of Balkan area whose pinnate leaves are white and silky-hairy below; source of an insecticide; sometimes placed in genus Chrysanthemum | Synonyms: Chrysanthemum cinerariifolium, Dalmatia pyrethrum, Dalmatian pyrethrum, Tanacetum cinerariifolium |
| (noun) made of dried flower heads of pyrethrum plants | - |
| pyrexia | (noun) a rise in the temperature of the body; frequently a symptom of infection | Synonyms: febricity, febrility, fever, feverishness |
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| styrene | (noun) a colorless oily liquid; the monomer for polystyrene | Synonyms: cinnamene, phenylethylene, vinylbenzene |
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| thyreophoran | (noun) armored dinosaurs: stegosaurs and ankylosaurs | Synonyms: suborder Thyreophora, Thyreophora |
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| tyre | (noun) hoop that covers a wheel | Synonyms: tire |
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