Aci'dulæ. n.s. [that is, aquæ acidulæ.]
Medicinal springs impregnated with sharp particles, as all the nitrous, chalybeate, and alum-springs are. Quincy.
The acidulæ, or medical springs, emit a greater quantity of their minerals than usual; and even the ordinary springs, which were before clear, fresh and limpid, become thick and turbid, and are impregnated with sulphur and other minerals, as long as the earthquake lasts. Woodward's Natural History, p. 4.