ădustĭo, ōnis, f. [aduro]. I.A kindling, burning; a burn (concrete only in Pliny): ulcera frigore aut adustione facta, Plin. 32, 4, 14, 34: adustiones sanat (lactuca), id. 20, 7, 26, 61.—Also of plants, e. g. vines, a rubbing, galling, Plin. 17, 15, 25, 116 al.—II.An inflammation: adustio infantium, quae vocatur siriasis, Plin. 30, 15, 47, 135.—Pass., a burned state, picis, Plin. 14, 20, 25, 127.