How much liquid can be held in an eyedropper?
Yes, milliliter is often used but the more commonly used term in the medical field (and we can presume that is what the field in question since an eye dropper was mentioned specifically) is the cubic centimeter (commonly abbreviated to cc). This is equivalent in size to a milliliter and when the liquid in question is water, it has a mass of one gram. Both the milliliter and cubic centimeter are metric measures of volume, so both should be acceptable answers and which is preferable is determined by the context in which the answer is sought.Also, just for the sake of comparison, one teaspoon is 5 cc (aka 5 ml), one tablespoon is 15 cc (15 ml), and one ounce is 29.57 cc (29.57 ml) but is usually rounded to 30.