| interspecies | (adjective) arising or occurring between species | Synonyms: interspecific |
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| intraspecies | (adjective) arising or occurring within a species; involving the members of one species | Synonyms: intraspecific |
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| species | (noun) a specific kind of something | - |
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| (noun) (biology) taxonomic group whose members can interbreed | - |
| subspecies | (noun) (biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species | Synonyms: race |
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| superficies | (noun) outer surface of an area or a body | - |
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| (noun) the purely external aspect of a thing; superficial appearance | - |