dropper

n instrument consisting of a short glass tube with a rubber bulb at one end for measuring out drops of medicine or other liquids 滴管.

drollery, dromedary, drone, drool, droop, droopy, drop, drop by, drop by/in, drop off, drop on, drop out, drop over, drop to one's knees, drop-goal, drop-hammer, drop-forge, drop-press, drop-kick, drop-out, droplet, dropout, droppings, dropsical, dropsy, dross, drought, drove, drover, drown, drowse, drowsily, drowsiness, drowsy, drubbing, drudge, drudgery, drug, drug addict, drug dealer, drug pusher, drugget, druggist,