An Oxford-based research project, the Dictionary of Medieval Latin from British Sources is a dictionary of medieval Latin in the British Isles from 540CE to 1600CE based entirely on original research. Published through Brepolis, the online version presents the contents of the print dictionary in a searchable format. Drawing only on sources from the British Isles, the dictionary shows localized usages of Latin words.

There are two versions of the DMLBS. The free version is available through Logeion and can only be searched by keyword. The paid version published by Brepols has more extensive search features and is accessible through Brepolis. On that version, a user may create advanced searches that include or exclude terms as well as browse an index of headwords.