citrus

Short definition from Wiktionary

Noun

1. 1
   Any of several shrubs or trees of the genus Citrus in the family Rutaceae.
2. 2
   The fruit of such plants, generally spherical, oblate, or prolate, consisting of an outer glandular skin (called zest), an inner white skin (called pith or albedo), 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

1. 1
   Of, relating to, or similar to citrus plants or fruit.

Proper noun

1. 1
   A census-designated place in Los Angeles County, California, United States.