On Medicine (De Medicina), Vol. 2

II. 8, and generally as an astringent gum in eye salves and lozenges. The juice was also used, II. 190 note, 196.

Acetum; vinegar.
As a drink, I. 196 ff.; used constantly both externally and internally, I. 212, 258, 270, 286, 292, 308, 310, 338, 346, 366, 388, 390, 394, 398, 406, 416, 438, 458; mentioned, II. 4, 8, as a styptic and exedent.

Achariston; name of a salve, II. 194 and note b.

Acopa; Anodynes, substances to deaden pain, II. 56 note b. See Anodyna.

Acorus; Acorus calamus; sweet flag.
The rhizome was dried and eaten, or the oil pressed out of it; it is included among diuretics, III. 316, as an ingredient in an antidote, II. 56, and perhaps (under the name of calamus Alexandrinus) in an anodyne salve, II. 56.

Adurentia (medicamenta quae adurunt medicines that burn, caustics); a list of these is given, II. 8, see also 130 ff.

Aes Cyprium or Cuprum; copper.
Many forms of this were used in prescriptions;
(1) Aerugo; basic subacetate and carbonate of copper or verdigris. This was scraped off sheets of copper which had been steeped in vinegar and used as an astringent, repressive or caustic, II. 4, 6. 8.
(2) Chalcitis; basic carbonate and sulphate of copper, copperas or green vitriol. This was mixed with oak bark or galls to make atramentum sutorium shoemaker's blacking, and used as a caustic and exedent, to arrest haemorrhage, to clean wounds and form a scar, II. 4, 6, 8, 10.
(3) Aes combustum; calcined copper ore.