noun, Biochemistry. 1. a pigment containing melanin, found in bird feathers. Origin of eumelanin. eu- + melanin.
1 In the United States, rapid-acting insulin, Lyspro (humalog) is mixed with NPH in a 50:50 (50% NPH and 50% insulin Lyspro) and 75:25 (75% NPH and 25% insulin Lyspro) ratio.  Insulin/Aspart (Novolog) combinations also are available as 70:30 mixtures (70% NPH, 30% insulin aspart).
Steps for Preparing a Mixed Dose of Insulin. Rolling the bottles gently. Step 1. Roll the insulin bottles (vials) gently between your hands. Roll the cloudy insulin bottle until all the white powder has dissolved. Rolling the bottle warms the insulin if you have been keeping the bottle in the refrigerator.