de|pro|tein|ize «dee PROH tee nyz, -tee uh nyz», transitive verb, -ized, -iz|ing.
to deprive of protein; take protein from: »
The amount of sugar in blood is shown by the color that a concentrated, deproteinized blood filtrate turns when treated with certain chemicals, then boiled and shaken (Science News Letter).
Useful english dictionary. 2012.