n. any compound, of general formula R2C=NNR2, formally derived from an aldehyde or ketone by replacing the carbonyl group with =NNH2 or derivative
The Century Dictionary and Cyclopedia
n. The name of a class of organic compounds with the group R′ CH:NNHR or R′ R″C:N.NHR, formed by the action of a hydrazine on a compound containing a carbonyl group, water being eliminated.
Word Usage
"The numbers approximate closely to those obtained by the hydrazone method."