Kidney :: Kidney (n.) A glandular organ which excretes urea and other waste products from the animal body; a urinary gland.
Kidney :: Kidney (n.) Habit; disposition; sort; kind.
Kidney-shaped :: Kidney-shaped (a.) Having the form or shape of a kidney; reniform; as, a kidney-shaped leaf..
Kidneywort :: Kidneywort (n.) A kind of saxifrage (Saxifrage stellaris).