cit'ronin

A yellowish coloring matter havmin. ing the constitution of dinitro diphenyl a- Citrus (sit'rus). A genus of aurantiaceous trees having a pulpy fruit with a spongy rind, such as the orange, lemon, lime, citron, shaddock, and other similar fruits. O. aurantium. 1. The orange tree. It has the following varieties: amara, dul* cis, and bergamia. 2. The sweet orange tree; C. aurantium, var. dulcis, of Linnaeus; C. dulcis of Lamarck. C. bergamia. The leaves yield an oil used to adulterate oil of bergamot, and the juice of the fruit constitutes a portion of the commercial concentrated lime juice used in making citric acid. C. limonum. The lemon tree. The peel of the fruit is aromatic and yields an oil much used in perfumerv. The fruit contains citric acid, and on this account the fresh juice is much used in scurvy. The e ential oil of lemon is made from the unripe or green fruit. C. vulgar is. The Seville orange. The flowers yield the e ence de nAroli bigarade and orange flower water. The peel or rind of the fruit (aurantn amari cortex [U. S. Ph.], aurantn cortex [Br. Ph.]) yields an oil used to flavor tinctures and elixirs. The ripe fruit is too bitter to eat. Its peel is a tonic, carminative, and stomachic, and is used in the manufacture of e ences, etc.