Definition of "doser" []

• An obsolete form of dosser, 1. (noun)
• Same as dorse, 2. (noun)

The Century Dictionary (Public Domain)

• "Espresso, ground far finer, is stale in an hour, which is why any espresso bar will have a doser-grinder that grinds the coffee every few minutes located right beside the espresso machine."
• "Caffe is double-strength coffee, not espresso — for espresso, you head down to the neighborhood coffee bar, where a man (almost always a man) or his son with decades of experience and $5,000 to 10,000 worth of commercial espresso machine and doser-grinder work their magic."
• "Finer grinds than these are suited only to commercial-quality espresso machines, which in order to function properly require a specially designed doser-grinder capable of very fine gradations in particle size."