blackback

Noun

1. An adolescent male gorilla or chimpanzee.
   • The author worked with two main study groups of gorilla in that region. Each contained a fully mature male (silverback), who was the obvious leader of the group, and a younger male of around 9 years of age (blackback),...
   • The second-ranking silverback is also a possible sire in the sixth case, although three other lower-ranking blackback males were also not excluded. - 2005, B. J. Bradley et al., “Mountain Gorilla Tug-of-War,”, in PNAS,...
2. The great black-backed gull.