adjective. Articulated with relatively strong pressure of the airstream below the glottis, as in English (p) and (t) compared with (b) and (d).

noun. A fortis consonant.

adjective. strongly articulated (of a consonant), hence voiceless

"The perfumer uses liq.amm. fortis, that is, strong liquid ammonia, and the sesqui-carbonate of ammonia, for preparing the various "salts" that he sells."

Mirabilis  Vita  abducet  aberit  adsit