Etymology
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Plimsoll (n.)

"mark on the hull of a British ship showing how deeply she may be loaded," 1876 (Plimsoll's mark), from Samuel Plimsoll (1824-1898), M.P. for Derby and advocate of shipping reforms (which were embodied in the Merchant Shipping Act of 1876 and required the load-line mark).

The sense was extended by 1907 to rubber-soled canvas shoe (equivalent of American English sneakers) because the band around the shoes that holds the two parts together reminded people of a ship's Plimsoll line; this sense perhaps also was reinforced by sound association with sole (n.1), which sometimes influenced the spelling to plimsole. The surname is of Huguenot origin.

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Definitions of Plimsoll
1
plimsoll (n.)
a light gym shoe with a rubber sole and a canvas top;
2
Plimsoll (n.)
waterlines to show the level the water should reach when the ship is properly loaded;
Synonyms: load line / Plimsoll line / Plimsoll mark
From wordnet.princeton.edu

Dictionary entries near Plimsoll

pliant

plie

plier

pliers

plight

Plimsoll

plink

plinth

plio-

Pliocene

PLO