 | Aqua Fortis Geber made this 'strong water', Nitric acid, by distilling green vitriol, with saltpetre and alum. When pure it is a colourless liquid, but it is often tinged brown by dissolved nitrogen oxides, whic… |
 | Aqua fortis (alternate) A symbol used in alchemy to indicate aqua fortis, better known as nitric acid. |
 | Aqua regia This mixture of two different acids was an important substance in the practice of alchemy. |
 | Aqua regia (alternate) This mixture of two different acids was an important substance in the practice of alchemy. |
 | Aquamarine Like many gemstones, the aquamarine possesses a number of different symbolic meanings. |
 | Aquarian Star The Aquarian Star, more commonly known as a Unicursal hexagram, is a symbol used to signify membership in the Men of Letters, a group of characters in the TV series Supernatural. |
 | Aquarius Aquarius is the eleventh astrological sign in the Zodiac, originating from the constellation Aquarius. |
