Maybe where you live, but not in Iowa. You'd totally mystify everyone around here with that definition.
In the upper Midwestern states (USA), black raspberries (aka black caps) are a true raspberry that ripens to a dark purple-black color. Red raspberries and blackberries do not grow wild here, but black raspberries are a native species in this region.
"...The black raspberry is also
closely related to the red raspberries Rubus idaeus and Rubus strigosus, sharing the distinctively white underside of the leaves and fruit that readily detaches from the carpel, but differing in the
ripe fruit being black, and in the stems being more prickly. The
black fruit makes them look like blackberries, though this is only superficial, with the
taste being unique and not like either the red raspberry or the blackberry...."
https://en.wikipedia.org/wiki/Rubus_occidentalis