A type of infectious agent of plants which is smaller than a virus and consists of circular single-stranded RNA without a protein coat.
单词 | θ17771 |
释义 | the world > life > biology > organism > micro-organism > virus > [noun] > viroid (1) viroid1971 A type of infectious agent of plants which is smaller than a virus and consists of circular single-stranded RNA without a protein coat. |
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