ブアン固こ定てい液えきMeanings1nounBouin's solution; Bouin's fixativeA histological fixative used in pathology and biology labs. The term is domain-specific and not used in everyday conversation.組そ織しきをブアン固こ定てい液えきに浸ひたして固こ定ていした。The tissue was fixed by immersing it in Bouin's solution.