百千克米

Poncelet \Ponce"let\, n. [After Jean Victor Poncelet, French
engineer.] (Physics)
A unit of power, being the power obtained from an expenditure
of one hundred kilogram-meters of energy per second. One
poncelet equals g watts, when g is the value of the
acceleration of gravity in centimeters.
[Webster 1913 Suppl.]