摘要：The occurrence of a great number of synonyms is frequent in the language of medicine, dental medicine, kinesiology, etc. Those terms have their etymology in classical languages, namely, Greek and Latin, and they sometimes co-occur with terms originating in an indigenous language. The economy of expression is an important feature of scientific language. The basic terminological principle to be followed is to choose one term and to use it consistently. The usage of a term may impose a different selection, namely the terms are selected among the existing synonyms in such a way that the most frequent term is preferred. Synonyms differ as for the range of their semantic fields. They should therefore be more carefully defined as words having a common prototype or core meaning
