Kadem
Kadem is a defunct measurement unit used in the Ottoman Empire.
Kadem means "foot" and during the last years of the Ottoman Empire 1 kadem was set to be in accordance with the British unit of length. But before the reign of Ottoman Sultan Selim III, kadem had a different definition. Its value was either 36.6666 cm. or 37.8869 cm.
During the Atatürk's Reforms metric system was adopted in Turkey.