n. a liquid terpene with a lemon odor; found in lemons and oranges and other essential oils. [ WordNet 1.5 ]

n. [ L. limoniades, pl., Gr. leimwnia`des, fr. leimw`n meadow. ] (Class. Myth.) A nymph of the meadows; -- called also Limniad. [ 1913 Webster ]

n. [ From NL. Citrus Medica, var. Limonum, the scientific name of the lemon. ] (Chem.) A bitter, white, crystalline substance found in orange and lemon seeds. [ 1913 Webster ]

n. [ Gr. leimw`n any moist grassy place, a meadow: cf. F. limonite, G. limonit. ] (Min.) Hydrous sesquioxide of iron, an important ore of iron, occurring in stalactitic, mammillary, or earthy forms, of a dark brown color, and yellowish brown powder. It includes bog iron. Also called brown hematite. [ 1913 Webster ]