Brown powder or prismatic powder, sometimes referred as "cocoa powder" due to its color, was a propellant used in large artillery and ship's guns from the 1870s to the 1890s.
bɹˈaʊn pˈaʊdɚ ɔːɹ pɹɪsmˈæɾɪk pˈaʊdɚ, sˈʌmtaɪmz ɹᵻfˈɜːd æz "kˈoʊkoʊ pˈaʊdɚ" dˈuː tʊ ɪts kˈʌlɚ, wʌzɐ pɹəpˈɛlənt jˈuːzd ɪn lˈɑːɹdʒ ɑːɹtˈɪlɚɹi ænd ʃˈɪps ɡˈʌnz fɹʌmðə wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd sˈɛvənti z tə ðə wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd nˈaɪnti z.