Definition of lactalbumin in US English:



  • A protein or mixture of similar proteins occurring in milk, obtained after the removal of casein and soluble in a salt solution.

    • ‘WPC contains biological compounds, like lactoferrin, alpha lactalbumin, immunoglobins and beta lactoglobins, affecting everything from your immune system to nitrogen balance to fat loss.’
    • ‘The active site of peptidoglycan lysis is disrupted in lactalbumin.’
    • ‘Popov and Poo measured the diffusion of fluorescently labeled lactalbumin, ovalbumin, and bovine serum albumin in neurites of growing Xenopus neurons after protein microinjection into the soma.’
    • ‘Antibodies to the principal cow's milk proteins were analyzed, including casein, [alpha] lactalbumin, and [beta] lactoglobulin.’
    • ‘Products containing lactic acid, lactalbumin, lactate and casein do not contain lactose.’


Late 19th century: from lacto- ‘of milk’ + albumin.