blackback

English

From black ‎ back.

blackback (plural blackbacks)

(zoology) An adolescent male gorilla or chimpanzee.
- 1979, A. H. Harcourt, “Contrasts between Male Relationships in Wild Gorilla Groups,”, in Behavioral Ecology and Sociobiology, volume 5, number 1, page 40:
  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), who had not yet assumed full adult morphology.
- 2005, B. J. Bradley et al., “Mountain Gorilla Tug-of-War,”, in PNAS, volume 102, number 26, page 9421:
  The second-ranking silverback is also a possible sire in the sixth case, although three other lower-ranking blackback males were also not excluded.
(UK) the great black-backed gull.