uret

[UREA.] Chem.: This name has been applied to the group CH2NO, which by substitution for one atom of hydrogen in ammonia, may be supposed to form CHINO N, and by substitution for two atoms of hydrogen, biuret, (CH2NO)2( } N. ( Watts .) urea, This term was formerly used as an affix indicative of combination: thus sulphuret now sulphide; phosphuret, phosphide, .