Definition of nessberry in US English:

nessberry

noun

  • A North American soft fruit of the loganberry type; the bush producing this, thought to be a cross between a North American dewberry and a North American raspberry, or perhaps a variety or cultivar of the former.

Origin

1920s. From the name of Helge Ness (d. 1928), Norwegian-born U.S. horticulturist who first raised it + berry.