millilitre noun1 •A unit of measure of capacity, equal to one thousandth of a litre. Symbol: mL or ml.A smaller mammal such as a dog has a sperm concentration of 300 000 000 per millilitre in an ejaculate of 8 ml in volume. Thus, each ejaculate will contain only 2 400 000 000 (24 × 10⁸). — 2012 formsmillilitres
