| demand | A quantity of a substance, commodity, or service wanted or required. (05 Mar 2000) |
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| demand pacemaker | A form of artificial pacemaker usually implanted into cardiac tissue because its output of electrical stimuli can be inhibited by endogenous cardiac electrical activity. (05 Mar 2000) |
| demand pulse generator | A generator which suppresses its output in response to natural ventricular activity but which, in the absence of such activity, functions as an asynchronous pulse generator. Synonym: demand pulse generator, standby pulse generator. (05 Mar 2000) |
| demandress | A woman who demands. Source: Websters Dictionary (01 Mar 1998) |
| baseload demand | The minimum demand experienced by an electric utility, usually 30-40% of the utility's peak demand. (05 Dec 1998) |
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| biochemical oxygen demand | The amount of oxygen aerobicorganisms need to carry out oxidative metabolism in watercontaining organic matter, such as sewage. (09 Oct 1997) |
| chemical oxygen demand | The amount of dissolved oxygen required to combine with chemicals in wastewater. A measure of the oxygen equivalent of that portion of organic matter that is susceptible to oxidation by a strong chemical oxidizing agent. (05 Dec 1998) |
| health services needs and demand | Health services required by a population or community as well as the health services that the population or community is able and willing to pay for. It includes the identification and assessment of the needs as measured by objective criteria and standards. (12 Dec 1998) |