TerminoWeb is designed to provide a work environment for terminologists to help them in one of their multiple tasks, that of doing a thematic search toward the understanding and the definition of a set of terms for a new domain (theme). It is a time consuming task for the terminologist to read through several documents to get an understanding of a domain and apprehend its main concepts and their interrelations. The purpose of TerminoWeb is to provide functionalities for collecting knowledge-rich documents into a corpus, for discovering important terms, and for exploring knowledge-rich contexts around these terms in the corpus. Such work environment would allow terminologists to focus their attention more quickly on the important material to read.