This is the 10086th most frequent Polish word.
białko
Protein.
Here, 'białko' refers to the macronutrient protein, typically associated with nutrition and health.
Białko jest ważne dla budowy mięśni.
Protein is important for muscle building.
In this sentence, 'białko' denotes the egg white, the clear substance within an egg.
Oddzielił białko od żółtka, aby zrobić bezę.
He separated the egg white from the yolk to make a meringue.
'Białka' here is the plural form of 'białko,' signifying various types of proteins, especially regarding biological or physiological contexts.