Sapo
(σάπων). A Keltic word, the original of our “soap,” though it denoted not a detergent, but a sort of pomade used for colouring the hair a light brown. It was made with goat's tallow and ashes, and was sold in balls, in which form it was imported by the Romans from Germany and Gaul, and used to bleach the hair (Pliny , Pliny H. N. xviii. 191; Mart. viii. 33, 20; xiv. 26); Beckmann, History of Inventions, ii. p. 92 (London, 1846); and Blümner, Technologie, i. 161.