hemin/ˈhi.mɪn/EtymologyFrom Ancient Greek αἷμᾰ (haîmă, “blood”) + -in. By surface analysis, hem- + -in.hemin means a reddish brown substance produced in a laboratory test for the presence of blood by reaction with glacial acetic acid and sodium chloride Lexicurio rates it Rare gem — a strength score of 71 out of 100.nouna reddish brown substance produced in a laboratory test for the presence of blood by reaction with glacial acetic acid and sodium chloride