plimsoll

A rubber-soled lace-up canvas shoe for sports or onboard ships; a precursor of trainers.

“Yes, there are two distinct sets of footprints, both wearing rubber shoes—one I think ordinary plimsolls, the other goloshes,” replied the sergeant.

While here, now, a large boy, a famous bully, swaggered to the front to bend, leering, and offer his satirical backside to be ineffectually beaten with a plimsoll by the gentle Scot.

The plimsoll symbol ⦵ (or o) that is used as a superscript in the notation of thermodynamics to indicate an arbitrarily chosen non-zero reference point.

A surname.