noun
1. : a less important reaction of two or more chemical reactions occurring at the same time
undesirable complex side reactions
— compare simultaneous reaction
2. : side effect
noun
1. : a less important reaction of two or more chemical reactions occurring at the same time
undesirable complex side reactions
— compare simultaneous reaction
2. : side effect
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012