A function which, being applied to output from a weakly random entropy source, together with a short, uniformly random seed, generates a highly random output that appears independent from the source and uniformly distributed.
“The report cites three untested but widely held assumptions about the extraction of plants from forests by local populations.”
“If the Vanguard locates any suspects in this most horrific plot, we are willing to assist them, if they wish, in the extraction of information from the suspects' minds.”
“High temperatures are used during the extraction of cooking oils.”
(automotive) A set of pipes fitted to the exhaust ports of an automotive engine, designed to increase its power output (essentially by altering gas pressures to get more fuel through it).