From Aaushi
Jump to navigation Jump to search


Organisms that lack an independent metabolism & are incapable of growth or reproduction apart from living cells. Viruses may be infectious. A complete viral particle usually contains DNA or RNA but NOT both & a protein shell or capsid that surrounds the nucleic acid. Viruses range in size for 15 nm up to several hundred nm, thus are generally not visible under light microscopy.

More general terms

More specific terms

Additional terms


  1. Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999