What does "rosemary" mean?

Rosemary: A labiate shrub (Rosmarinus officinalis) with narrow grayish leaves, growing native in the southern part of France, Spain, and Italy, also in Asia Minor and in China. It has a fragrant smell, and a warm, pungent, bitterish taste. It is used in cookery, perfumery, etc., and is an emblem of fidelity or constancy. There's rosemary, that's for remembrance. Shak. Marsh rosemary. (a) A little shrub (Andromeda polifolia) growing in cold swamps and having leaves like those of the rosemary. (b) See under Marsh. -- Rosemary pine, the loblolly pine. See under Loblolly.