Категория noun.substance

a white cheeselike protective material that covers the skin of a fetusvernix; vernix caseosa;
a vitrified substance; the glassy result of being vitrifiedvitrification;
a small mass of soft materialwad;
a salt or ester of xanthic acidxanthate;
any of a class of unstable organic acids containing sulphurxanthic acid;
crystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urinexanthine;