To help, prop up, strengthen or reinforce. A knife bolster is a thick junction between the handle and the knife blade which provides a smooth transition from the blade to the handle. It strengthens the knife, adds durability, and provides a counter-balance. Since the handle is lighter than the blade, the bolster contributes to better balance and improves control. The bolster can extend all the way to the bottom or may be ground to enable full use of the knife edge when chopping, as well as, allow full sharpening. Examples: Bolsters are typically found on forged knives, but can also be added to knives that have been laser cut or stamped.
the vaccinia virus; a laboratory generated virus, antigenically related to the cowpox virus, that causes a lesion on the teat skin of affected cows. It is indistinguishable from cowpox lesions and used to be used to vaccinate humans against smallpox.
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.