Tare:
The tare of a container is its weight when it’s empty, which is important to know when you can’t weigh something without putting it into something else. [Vocabulary.com]
Noted on a recently received arborist bill. I’d never seen such a word before. My Arts Editor says she sees it everywhere. Frankly, its usage didn’t make much sense to me. It was used in a column header:
Rate of Dilution Mixing Tare
