A free online dictionary for students, teachers, & the curious to find meanings, examples, pronunciations, word origins, & quotations.
ResearchGate is a website that requires verification of your humanity before allowing access. This process may take a few seconds as the site reviews the security of your connection.
PubMed is a free search engine that provides access to millions of biomedical and life science research articles, journals, and other resources. It is maintained by the U.S. National Library of Medicine.
AnkiWeb is a free, web-based flashcard application that allows users to study, share, and sync flashcards across devices. It is ideal for learning through spaced repetition.