Rosemary, Rosmarinus officinalis, is a woody, perennial herb with fragrant, evergreen, needle-like leaves and white, pink, purple or blue flowers, native to the Mediterranean region. It is a member of the mint family Lamiaceae, which includes many other herbs, and is one of two species in the genus Rosmarinus. The name "rosemary" derives from the Latin name rosmarinus, derived from "dew" (ros) and "sea" (marinus), or "dew of the sea"] because in many locations it needs no water other than the humidity carried by the sea breeze to live. The plant is also sometimes called Anthos, from the ancient Greek word ἄνθος, meaning "flower".
Rosemary is used as a decorative plant in gardens and has many culinary and medical uses. The plant is said to improve the memory and is used as a symbol of remembrance, especially in Australia and New Zealand to commemorate ANZAC Day. The leaves are used to flavor various foods, like stuffings and roast meats. Rosemary contains the antioxidants carnosic acid androsmarinic acid, and other bioactive compounds including camphor, caffeic acid, ursolic acid,betulinic acid, rosmaridiphenol, and rosmanol. Some of these may be useful in preventing or treating cancers, strokes and Alzheimer's Disease.

The name derives from the Latin words ros marinus, which translate as dew of the sea. According to legend, it was draped around the Greek goddess Aphrodite when she rose from the sea, born ofOuranos's semen. The Virgin Mary is said to have spread her blue cloak over a white-blossomed rosemary bush when she was resting, and the flowers turned blue. The shrub then became known as the 'Rose of Mary'.