naked virus, nonenveloped virus a virus lacking an outer lipoprotein bilayer. neurotropic virus one that has a predilection for and causes infection in nervous tissues, e.g., the rabies virus. Norwalk virus a calicivirus that is a common agent of epidemics of acute gastroenteritis. oncogenic viruses an epidemiologic class of viruses that are acquired by close contact or injection and cause usually persistent infection; they may induce cell transformation and malignancy.
Define stumbling block: an obstacle to progress; an impediment to belief or understanding : perplexity â stumbling block in a sentence an obstacle to progress; an impediment to belief or understanding : perplexityâ¦
Butcher's block in modern American kitchen. A circular chopping block used in a restaurant in Haikou, Hainan, China. Butcher block (or butcher's block) is a style of assembled wood (often sugar maple, teak, or walnut) used as heavy duty chopping blocks, table tops, and cutting boards. It was commonly used in butcher shops and meat processing plants but has now become popular in home use.