Citrus Aurantium, var. Bergam'ia, Bergamot; Oleum Bergamottae, Oil of Bergamot, N.F. -- The volatile oil obtained by expression from the rind of the fresh fruit with not less than 36 p.c. of ester, calculated as linalyl acetate; S. Italy, France; cultivated. Small tree resembling the lemon and orange, flowers peculiar, delicious odor, fruit pale lemon color, pyriform or globose, with concave receptacles of oil in the rind. Oil obtained as that of lemon and orange, and is a greenish-yellow liquid, neutral, faintly acid, characteristic fragrant odor, aromatic bitter taste; forms clear solution with alcohol (1/2), not turbid with further addition, soluble in glacial acetic acid, 80 p.c., alcohol (2), with slight cloudiness and no separation of oil globules; sp. gr. 0.877, dextrorotatory; 2 Gm. evaporated to soft green residue--corresponds to not more than 6 p.c. of the oil (abs. of fixed oils); contains limonene (citrene), dipentene (bergaptene, bergamot camphor), linalool, and linalool acetate 36-39 p.c., upon which the value chiefly depends. Stimulant, excitant, aromatic; used exclusively as a perfume; 1. Spiritus Odoratus, 1.5 p.c.