'Barbarea' is a genus of plants in the mustard family (Brassicaceae). It includes several species commonly known as wintercress or bittercress. These herbaceous plants are native to Europe, Asia, and North America and are characterized by their basal rosettes of rounded or lobed leaves and small yellow flowers. Some species are grown as ornamentals, while others are considered weeds in agricultural settings. The name 'Barbarea' comes from the Latin word 'barba,' meaning beard, in reference to the bristly hairs on the stems of some species.

It is important to note that 'Barbarea' is a scientific name for a genus of plants and does not have a specific medical definition. While some plants in this genus may have medicinal properties, there is no general medical definition or significance associated with the term 'Barbarea.'