hematein

[hee-muh-tee-in, hem-uh-, hee-muh-teen, hem-uh-] /ˌhi məˈti ɪn, ˈhɛm ə-, ˈhi məˌtin, ˈhɛm ə-/
noun
1.
a reddish-brown, crystalline, slightly water-soluble solid, C 16 H 12 O 6 , obtained from logwood: used chiefly as a stain in microscopy.
Origin
variant of hematin
British Dictionary definitions for hematein

haematein

/ˌhiːməˈtiːɪn; ˌhɛm-/
noun
1.
a dark purple water-insoluble crystalline substance obtained from logwood and used as an indicator and biological stain. Formula: C16H12O6
hematein in Medicine

hematein he·ma·te·in (hē'mə-tē'ĭn, hē'mə-tēn')
n.
A reddish-brown crystalline compound used as an indicator and a biological stain.