Plimsoll's mark

Related to Plimsoll's mark: Plimsoll line

Plim´soll's mark`

1.(Naut.) A mark conspicuously painted on the port side of all British sea-going merchant vessels, to indicate the limit of submergence allowed by law; - so called from Samuel Plimsoll, by whose efforts the act of Parliament to prevent overloading was procured.