Plimsoll markPlim·soll mark
Origin of Plimsoll markafter Samuel Plimsoll (1824-98), Eng advocate of legislation against overloading vessels
Origin of Plimsoll markAfter Samuel Plimsoll (1824-1898), British merchant and shipping reformer
(plural Plimsoll marks)
From Samuel Plimsoll, Bristol merchant and member of Parliament, promoter of the Merchant Shipping Act.