earlier; prior / rudimentary / in front of

(pharmacology) a monoclonal antibody that targets prostate tumors

Initialism of pressure retarded osmosis. / (medicine) Initialism of patient-reported outcome.

(syntax) A theoretical phonologically null pronoun

plural of pro

plural of Pro

plural of PRO

A movement that promotes anorexia nervosa as an acceptable lifestyle choice. / A member of this movement.

A movement that promotes bulimia as an acceptable lifestyle choice. / A member of this movement.

(law, medicine) Done without fee, generally for clients or patients of limited means.