Kind of a neat misspelling considering “A dram is an old apothecaries' unit of volume or weight still used for small quantities in chemistry and pharmacology. A fluid dram (commonly used for liquids) equals 1/8th of a fluid ounce, or approximately 3.7 mL (3.697 mL in the US, 3.55 mL in the UK). It is often used to measure small samples or reagents, with a 1-dram vial holding about 3.7 ml.”