noun, feminine/plɛ̃t/plural: plinthes
plinthe is feminine in French.
plinth; skirting board; baseboard (panel between floor and interior wall)
Inherited from Middle French plinte, later plinthe, from Latin plinthus, also compare Russian пли́нтус (plíntus, “skirting board”), Greek πλίνθος (plínthos, “brick”).