hemocyanin

noun 0.628

pigment

noun 0.611

oxyhaemoglobin

noun 0.611

bile pigment

noun 0.595

photopigment

noun 0.592

hemoglobin

noun 0.591

transport protein

noun 0.574

porphyrin

noun 0.569

myoglobin

noun 0.554

respirator

noun 0.547

pigmentation

noun 0.541

respirometer

noun 0.537

tetrapyrrole

noun 0.536

respiratory system

noun 0.535

phycoerythrin

noun 0.534

chromatophore

noun 0.533

respiration

noun 0.529

chromophore

noun 0.528

globin

noun 0.527

oxygenator

noun 0.527

carboxyhemoglobin

noun 0.525

heme

noun 0.524

erythrocyte

noun 0.523

erythroid

noun 0.522

red blood cell

noun 0.521

protoporphyrinogen oxidase

noun 0.511

cytochrome

noun 0.510

erythropoietin

noun 0.508

photorespiration

noun 0.502

leghemoglobin

noun 0.500