small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
not practical; not workable or not given to practical matters; "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution"
characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic)
displaying luxury and furnishing gratification to the senses; "an epicurean banquet"; "enjoyed a luxurious suite with a crystal chandelier and thick oriental rugs"; "Lucullus spent the remainder of his days in voluptuous magnificence"; "a chinchilla robe of sybaritic lavishness"
of Epicurus or epicureanism; "Epicurean philosophy"
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