tare
noun [ U or S ]
uk/teər/ us(also tare weight) MEASURES, TRANSPORT
the weight of a vehicle or container when empty, taken away from the combined weight of the vehicle, etc. plus the goods it is carrying to find the net weight of the goods:
The tare weight of grain hopper cars is approximately 20 tonnes.
MEASURES
the weight of the material in which goods are wrapped, taken away from the total weight of the goods including this material to find the net weight of the goods:
In surveying meat packaging, we found that the overweight from tare ranged from .01 pounds to .33 pounds.