Since the Mendenhall Order of 1893, the U.S. yard and pound and all other units derived from them have been defined in terms of the metric units of length and mass, the meter and the kilogram ;
(all other units; derived; from them) (the U.S. yard and pound and all other units; have been defined; in terms of the metric units of length and mass, the meter and the kilogram; T:Since the Mendenhall Order of 1893)
all other units the U.S. yard and pound and all other units
derived have been defined
from them
in terms of the metric units of length and mass, the meter and the kilogram T:Since the Mendenhall Order of 1893