ˌ ̷ ̷ ̷ ̷ˈkrüərə̇n noun
( -s )
Etymology: chlor- + cruorin (old name for hemoglobin), from Latin cruor blood) + English -in — more at raw
: a green iron-containing respiratory pigment related chemically to hemoglobin and found in the blood of certain marine polychaete worms