11:5 · A sign often found on Greek vases from around 700 B.C.
    It is used in certain types of cartography as a sign indicating stone bottom at the water's edge.
    In seventeenth-century alchemy or chemistry, it (and its variation ) represented distilled vinegar or acetum. Note the points, which in Western ideography often are signs for water. Here they are signs for the drops of condensated liquid.