Benzal

noun

1. An organic radical having the formula C6H5CH and a valence of two.
2. A prefix sometimes used to indicate that a compound is derived from benzaldehyde.
3. A compound radical, C6H5.CH=, of the aromatic series, related to benzyl and benzoyl; -- used adjectively or in combination.
4. A transparent crystalline substance, C6H5.CO. NH2, obtained by the action of ammonia on benzoyl chloride and by several other reactions with benzoyl compounds.