(of animals especially human beings) having arrived at the onset of puberty (the age at which sex glands become functional) but not yet fully mature; "the budding breasts of a pubescent girl and the downy chin of pubescent boy"
small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
unusually great in size or amount or degree or especially extent or scope; "huge government spending"; "huge country estates"; "huge popular demand for higher education"; "a huge wave"; "the Los Angeles aqueduct winds like an immense snake along the base of the mountains"; "immense numbers of birds"; "at vast (or immense) expense"; "the vast reaches of outer space"; "the vast accumulation of knowledge...which we call civilization"- W.R.Inge
any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk