hematoxylin

noun1

1. •
   A phenolic compound having the chemical formula C₁₆H₁₄O₆, used (most often in conjunction with eosin) to make dye for staining tissue samples; extracted from the heart of bloodwood trees (Haematoxylum campechianum).

   • Histology sections were cut at 5–6 µm on a rotary microtome, mounted on glass slides, and stained with Harris’s haematoxylin and eosin in a Stainomatic specimen stainer. — 1995