Masson was a French publisher specialised in medical and scientific collections. In 1987, Masson purchased Armand Colin. In turn, it became part of the City Group (Groupe de la Cité) in 1994. In 2005, Masson merged with Elsevier France, creating Elsevier Masson.
In 1962, Masson published a French language translation of a book about a fictitious order called the Rhinogradentia written by the German zoology professor Gerolf Steiner.
In 2000, in association with the language software company Ultralingua, the Masson French-English Medical Dictionary was published in electronic form for the Macintosh and Microsoft Windows computer platforms.