The aim of this project is to develop a common homeopathic terminology to improve communication. A questionnaire was sent by email to an international group of experts. As a result of an iterative process we propose that a number of terms which are inaccurate, unclear or have become outdated should be replaced by new terms. The main areas in which terminology should be updated are: concepts relating to: homeopathic pharmacology, research, homeopathic medicine, the principle of similarity, homeostasis and disease imitation, miasms, experimental homeopathy, provings and pathogenic trials.