Ulcus acidum of Meckel's diverticulum.

Antidesma acidum : (Thailand)

Hydrochloric acid was known to European alchemists as spirits of salt or acidum salis (salt acid).

Its name is formed from Latin acidum ("sour") and Sasa (another bamboo genus), referring to its edible shoots.

Taurocholic acid, known also as cholaic acid, cholyltaurine, or acidum cholatauricum, is a deliquescent yellowish crystalline bile acid involved in the emulsification of fats.

Alchemists of the Middle Ages recognized that hydrochloric acid (then known as spirit of salt or acidum salis) released vaporous hydrogen chloride, which was called marine acid air.

Meconic acid, also known as acidum meconicum and poppy acid, is a chemical substance found in certain plants of the Papaveraceae family (poppy) such as Papaver somniferum (opium poppy) and Papaver bracteatum.

The name Acidicaldus derives from:New Latin noun acidum (from Latin adjective acidus, sour), an acid; Latin adjective caldus, warm, hot; New Latin masculine gender noun Acidicaldus, a (moderately) thermophilic acid-requiring microorganism.

Camphoric acid, CHO or in Latin form Acidum camphoricum, is a white crystallisable substance obtained from the oxidation of camphor, it exists in three optically different forms; dextrorotatory one is obtained by the oxidation of dextrorotatory camphor and used in pharmaceuticals.

Acidum camphoricum was studied and isolated for the first time by French pharmacist Nicolas Vauquelin in the early 19th century but it wasn't until September 1874 that Dutch chemist Jacobus H. van 't Hoff proposed the first suggestion for its molecular structure and optical properties.