burette
noun [ C ] science specialized (also buret) uk/bjʊəˈret/ us/bjʊˈret/
量筒（有刻度的玻璃管，底部有一小龙头，用来把指定容量的液体加到别处）
a glass tube with measurements printed on it and with a small tap at the base, used for adding a measured quantity of liquid into something