Natural killer cells, or NK cells, are a component of the innate immune system which does not directly attack invading microbes. Rather, NK cells destroy compromised host cells, such as tumor cells or virus-infected cells, recognizing such cells by a condition known as missing self..
Definition. Market Value is generally defined as: âThe most probable price which a property should bring in a competitive and open market under all conditions requisite to a fair sale, the buyer and seller, each acting prudently, knowledgeably and assuming the price is not affected by undue stimulus.
par value. 1  the coupon price of a FINANCIAL SECURITY; for example, the initial face value or nominal price of an ORDINARY SHARE (as opposed to its market price). 2  The fixed price of a CURRENCY in terms of other currencies under a FIXED EXCHANGE-RATE SYSTEM.