An act of innocent deceit, technically using the methods of a fraudster but for an honest, honorable purpose. / A person involved in such a fraud.

(pharmacology) A thiazolidinedione derivative taken orally in the form of its hydrochloride C₁₉H₂₀N₂O₃S·HCl to treat type 2 diabetes by decreasing insulin resistance.

(physics) Of, pertaining to, or composed of pions.

(physics) Lacking pions

In a pioneering manner

plural of pioner

Obsolete form of pioneer (military sapper or digger)

(sometimes derogatory) A fictional, often religious narrative, presented as true by its author to accomplish some altruistic motive.

Either of two extinct passerine songbirds of New Zealand comprising the genus Turnagra: the North Island piopio (Turnagra tanagra) and South Island piopio (Turnagra capensis).

plural of piopio