hb

Noun hb has 1 sense

• hb(n = noun.substance) haemoglobin, hemoglobin - a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues; "fish have simpler hemoglobin than mammals"
is a kind of haemoprotein, hemoprotein
has particulars: oxyhaemoglobin, oxyhemoglobin