A grinder that ejects its grounds through a chute, rather than into a doserA doser is a mechanism, usually attached to the front of a burr grinder, for putting coffee into an espresso portafilter basket.: A doser is a mechanism, usually... used for espressoA small coffee beverage, about 20 ml, prepared on an espresso machine where pressurized hot water extracted through compressed coffee.: In its most stripped-down, basic form, this is...