noun
or bouin's solution (ˈ)bü|anz-, -aⁿz-; ˈbwaⁿz- ; also bouin -an, -aⁿ
Usage: usually capitalized B
Etymology: after Paul Bouin, 20th century French histologist
biology : a fixing and preserving solution consisting of picric acid, formaldehyde, and glacial acetic acid