citrus
noun
°Any of several shrubs or trees of the family Rutaceae.
°The fruit of such plants, generally spherical, oblate, or prolate, consisting of an outer glandular skin called zest, an inner white skin, and generally between 8 and 16 sectors filled with pulp consisting of cells with one end attached to the inner skin. Citrus fruits include orange, grapefruit, lemon, lime, and citron.
adjective
°Of, or relating to citrus plants or fruit.