virino: (microbiology) a hypothetical infectious particle thought to be the cause of scrapie and other degenerative diseases of the central nervous system; consists of nucleic acid in a protective coat of host cell proteins
particle: a body having finite mass and internal structure but negligible dimensions
meat thermometer: a thermometer that is inserted into the center of a roast (with the top away from the heat source); used to measure how well done the meat is