carbamic acid

noun
1.
a hypothetical chemical compound, NH 3 CO 2 , known only in the form of its salts, as ammonium carbamate, or its esters, as urethan.
Origin
1860-65
British Dictionary definitions for carbamic acid

carbamic acid

/kɑːˈbæmɪk/
noun
1.
a hypothetical compound known only in the form of carbamate salts and esters. Formula: NH2COOH
carbamic acid in Medicine

carbamic acid car·bam·ic acid (kär-bām'ĭk)
n.
A hypothetical acid that exists only in the form of its esters and salts.