| echelon | (noun) a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset | - |
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| (noun) a body of troops arranged in a line | - |
| (noun) status in a society or organization | - |
| epipelon | (noun) cyanobacteria and eukaryotic algae that live on or in association with fine-grained substrata. | - |
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| felon | (noun) someone who has committed a crime or has been legally convicted of a crime | Synonyms: criminal, crook, malefactor, outlaw |
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| (noun) a purulent infection at the end of a finger or toe in the area surrounding the nail | Synonyms: whitlow |
| melon | (noun) any of numerous fruits of the gourd family having a hard rind and sweet juicy flesh | - |
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| (noun) any of various fruit of cucurbitaceous vines including: muskmelons, watermelons, cantaloupes, cucumbers | Synonyms: melon vine |
| muskmelon | (noun) the fruit of a muskmelon vine; any of several sweet melons related to cucumbers | Synonyms: sweet melon |
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| (noun) any of several varieties of vine whose fruit has a netted rind and edible flesh and a musky smell | Synonyms: Cucumis melo, sweet melon, sweet melon vine |
| paddymelon | (noun) small reddish-brown wallabies of scrubby areas of Australia and New Guinea | Synonyms: pademelon |
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| pademelon | (noun) small reddish-brown wallabies of scrubby areas of Australia and New Guinea | Synonyms: paddymelon |
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| watermelon | (noun) large oblong or roundish melon with a hard green rind and sweet watery red or occasionally yellowish pulp | - |
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| (noun) an African melon | Synonyms: Citrullus vulgaris, watermelon vine |