Abstract : Many multilingual terminological resources are available today for information professionals and for the general public. Implemented as electronic devices, these resources serve as a mediation tool between users and the information they need, thus making them knowledge acquisition devices. We analyse the structure of some resources, the type of information they offer for a term, the search options as well as the results exploration modalities. The aim is later to assess how these devices contribute towards knowledge acquisition and more precisely, how the terminological resources enable information professionals find equivalent terms in a multilingual framework. The current survey brings to light a certain level of hybridisation among resources making it more difficult to qualify a resource using the usual and classical frontiers (dictionary, thesaurus, ontology, terminology base). This is because, some resources, in the course of their design as electronic devices or during their migration to an electronic form adopted forms and structures issuing from different types of resources. The hybridisation of terminological resources thus appears as the favoured avenue to meet the needs of today's information professionals for knowledge acquisition in a multilingual framework.