This lemon is sour.

Please add a little vinegar to this salad.

In organic chemistry, hippurate is known as a compound of the amino acid glycine and benzoic acid.

Her eyes were a beautiful amber color.

His body showed a rejection reaction to the transplanted organ.

His single word triggered a chain reaction, and everything changed.

She overreacted to his words.

Nuclear reactions are used for mass production of energy.

I was surprised by his overreaction.

In chemistry class, I learned about the reaction of pyruvate.