Plimsollmark

Plim·soll mark (plĭmʹsəl, -sôl') n.

Any of a set of lines on the hull of a merchant ship that indicate the depth to which it may be legally loaded under specified conditions. Also called load line, Plimsoll line.

  [After SamuelPlimsoll (1824-1898), British merchant and shipping reformer.]

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