This is the story of the scientific career of the Polish-born scientist whose only claim to greatness was the coining of the word "vitamine." Were it not for that one fact, Casimir Funk's name would be no better known than hundreds of other biochemists who have made equally important contributions to nutrition and biochemistry. It is a story of frequent, and seemingly aimless, wanderings from one laboratory to another and from one country to another. Always in search of security, Funk rarely stayed in one place more than a few years; more often than not, what promised to be a well-equipped laboratory turned out to be empty, inadequate quarters.