biochemical oxygen demand

A mechanism in a diving regulator which controls the supply of gas by opening to provide flow when the user inhales, and shuts off supply when inhalation stops.

Alternative spelling of print on demand

(publishing) A system of printing very small runs of a document as required, especially by using computer technology.

(economics) A capitalistic model of price determination in a market.

(usually in the plural) An aspect of an experimental design that leads subjects to infer, and comply with, researcher expectations, thereby confounding the experimental results.

plural of demand characteristic

A telecheck.

plural of demand deposit

(banking) A bank deposit that may be withdrawn without notice.