Initialism of Protein Digestibility Corrected Amino Acid Score (“method of evaluating the quality of a protein”).

Initialism of People’s Democratic Republic of Ethiopia.

Initialism of poly(diketoenamine).

plural of PDR

Acronym for "Powell's Derivative-Free Optimization solvers". PDFO is a cross-platform package providing interfaces for using Michael J. D. Powell's derivative-free optimization solvers, including COBYLA, UOBYQA, NEWUOA, BOBYQA, and LINCOA, which were originally implemented in Fortran 77.

In a speedy or fast manner.

Alternative form of on the pdq