滴定

滴定	dī dìng	titration
滴	dī	to drip / to let drip; to apply (eye drops etc) / (bound form) a drop (of liquid) / classifier for drops of liquid
定	dìng	to fix; to set; to make definite / to subscribe to (a newspaper etc); to book (tickets etc); to order (goods etc) / to congeal; to coagulate / (literary) definitely