Answer: calcar

AnswerCrossword Clue
CALCARSpur on a bird's wing.
CALCARSpur: Biol.
CALCARSpur on a bird's leg or wing
calcara type of oven (a closed space for baking) / in anatomy, a spur-like projection
calcarreverberatory furnace for preparing frit
calcarspur or spurlike process