The Collaborative International Dictionary
Benzal
Benzal \Ben"zal\, n. [Benzoic + aldehyde.] (Chem.) A compound radical, C6H5.CH=, of the aromatic series, related to benzyl and benzoyl; -- used adjectively or in combination.
Wiktionary
benzal
n. (context chemistry English) A transparent crystalline substance, C6H5.CO. NH2, obtained by the action of ammonia on benzoyl chloride and by several other reactions with benzoyl compounds.