Term: prothrombin: a protein in blood plasma that is the inactive precursor of thrombin
Broader: protein: any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes | Unrelated: yellow-bellied sapsucker: eastern North American sapsucker having a pale yellow abdomen
Broader: protein: any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes | Unrelated: ravenna grass: grass often cultivated for its long white-ribbed leaves and large plumes resembling those of pampas grass