See Argentum vivum. Aroma, (from Arohot 1189 intensely, and to smell).

Any thing fragrant or odorous; sometimes it is taken for myrrh. The aroma of plants is probably an essential oil, highly volatile, and with the greatest difficulty preserved by distillation. The exquisite perfume styled the attar (oil) of roses, we are taught how to prepare in one of the early volumes of the Asiatic Researches: other delicate perfumes, united with inodorous oils, are in that state preserved by combining them with alcohol by a very gentle heat. The ancient chemists, however, designated by this title the peculiar discriminated odour which belongs to each individual, and perhaps to every body in the universe; and they applied this to medicine by endeavouring to extract the odour, which they styled the quintessence: we need not say with little real advantage.

Aroma germanicum.. See Exula. Aroma philosophorum. See Crocus. This term also implies a preparation of Paracelsus, styled aroph, consisting of flowers from lapis haematites and sal ammoniac sublimed together. It forms a medicine recommended in quartans, and in the plica Polonica.