This paper deals with the appropriation of the new chemical terminology in late nineteenthcentury Spain. It analyses the perceptions about the advantages and problemes generated by the new terminology. The study sheds light on the nature of the current terminology, its circulation and uses in classrooms and the causes of its constant transformation. In tune with current studies on the circulation of scence, the paper discusses practices of negotiation, appropriation and resistance related to the spread of scientific terminology. The historical perspective offers evidence about the collective and provisional character of scientific terminology and encourages the search for renovated links between history and didactics of science.