From cera, wax). Cerate; called also Cerelaeum (which see), ceroma, ceronium, cero-tum, ceratomalagma. Cerates chiefly differ from plasters in consistence, being a softer kind of plaster, or harder kind of ointment. Their consistence is very convenient: when mercury is made up in plasters, a sufficient quantity is not absorbed from them to produce any very certain effect; but in a cerate it is resolvent and discutient, and when thus applied to venereal tophi and nodes, they often yield to it. The general rule for cerate is, eight parts of oil, fat, or juices, four of wax, and one or two of powder: or three ounces of oil, half an ounce of wax, and two or three drachms of powder. The London college directs the ceratum album to be made, of olive oil, four ounces by measure; of white wax, two ounces in weight; of spermaceti, half an ounce in weight: these must be melted and stirred together till the cerate is quite cold.

Ceratum antimonii vitrum. See Antimonium.

Ceratum lythargyri. See Lithargyrum.

Ceratum hydrargyri nitrati. See Mercur. Praecipit Rub.

Ceratum mellis. See Mel.

Ceratum citri num. - Take of the ointment of yellow resin, half a pound; of yellow wax, one ounce: melt them together. Ph. Lond. 1788.

Ceratum rubrum. Red cerate. Take yellow wax, and sheep's suet, of each two pounds: red sulphurated quicksilver, fifteen grains: yellow resin, two ounces. Melt the resin, wax, and suet together, and afterwards add the sulphurated quicksilver; this is a cheap cerate for external dressings.

Ceratum epuloticum. See Calaminaris lapis.