| antibaryon | (noun) the antiparticle of a baryon; a hadron with a baryon number of -1 | - |
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| baryon | (noun) any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions; a hadron with a baryon number of +1 | Synonyms: heavy particle |
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| canyon | (noun) a ravine formed by a river in an area with little rainfall | Synonyms: canon |
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| crayon | (noun) writing implement consisting of a colored stick of composition wax used for writing and drawing | Synonyms: wax crayon |
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| dacryon | (noun) the craniometric point at the junction of the anterior border of the lacrimal bone with the frontal bone | - |
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| halcyon | (noun) a mythical bird said to breed at the time of the winter solstice in a nest floating on the sea and to have the power of calming the winds and waves | - |
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| karyon | (noun) a part of the cell containing DNA and RNA and responsible for growth and reproduction | Synonyms: cell nucleus, nucleus |
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| ophryon | (noun) the craniometric point in the midline of the forehead immediately above the orbits | - |
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| pinyon | (noun) any of several low-growing pines of western North America | Synonyms: pinon |
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| rayon | (noun) a synthetic silklike fabric | - |
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| sabayon | (noun) light foamy custard-like dessert served hot or chilled | Synonyms: zabaglione |
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| toyon | (noun) ornamental evergreen treelike shrub of the Pacific coast of the United States having large white flowers and red berrylike fruits; often placed in genus Photinia | Synonyms: Christmas berry, Christmasberry, Heteromeles arbutifolia, Photinia arbutifolia, tollon |
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