sb. pl. Obs. [L. acidulus adj. ‘sourish,’ in pl. fem. sc. aquæ waters.] A name formerly given to springs of cold mineral waters, from their sharp and pungent taste, then considered acid.
1681. Phillips, Acidulae; Any Medicinal or Spaw-waters that are not hot; in which respect they are oppos’d to Thermae.
1681. T. Willis, Rem. Med. Wks. (Vocab.) Acidulæ. Medicinal waters running forth from veins of iron, copper, and such like, called Spaws from that famous place for mineral-waters, the Spaw in Germany.
1765. Brownrigg, in Phil. Trans., LV. 242. The brisk and pungent taste of the acidulæ is also a further evidence that the mineral air which they contain is nearly related to the choak-damp.
