tare
1. tare \'ta(*)r, 'te(*)r\ n [ME] 1a: the seed of a vetch 1b: any of several vetches (esp. Vicia sativa and V. hirsuta ) pl 2: a weed of grainfields usu. held to be the darnel pl 3: an undesirable element 2. tare n [ME, fr. MF, fr. OIt tara, fr. Ar tsub-dot>arhsub-dot>]a, lit., that which is removed 1: a deduction from the gross weight of a substance and its container made in allowance for the weight of the container 2: COUNTERWEIGHT; esp : an empty vessel similar to a containe r used to counterpoise change in weight of the container due to conditions (as temperature or moisture) 3. tare vt : to ascertain or mark the tare of; esp : to weigh so as to deter mine the tare
Webster's English Dictionary