viroid

名词 viroid:

1. the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat
   同义词：virusoid

vi.roid

n.（名词）
An infectious particle, similar to but smaller than a virus, that consists solely of a strand of RNA and is capable of causing disease in plants.
类病毒：一种传染性微粒，与病毒相象但比病毒小，由核糖核酸单链构成，能在植物中引起疾病