In pharmacology, diapalma (from Lat dia, "made of" + palma, "palm") is a desiccating or drying plaster, named for the wood of the palm tree, from which the spatula is made that is used to stir the mixture while boiling.
In pharmacological contexts, diapalma refers to a drying agent made from palm wood, employed to prepare medicinal mixtures by removing moisture while stirring with a spatula.