anti-dilution       
adjective [ before noun ]  finance & economics specialized (also antidilution) uk/ˌæn.ti.daɪˈluː.ʃən/ us/ˌæn.taɪ.dɪˈluː.ʃən/
 防止股权稀释的
opposing the process of making a company's shares less valuable when more shares in it are made available 
  They were granted anti-dilution rights to protect their investment. 他们被授予了防止股权稀释的权利,以保护他们的投资。 
 - More examples
 - The firm granted anti-dilution rights to all of its investors.
 - The company was criticized for promising that the private equity fund would have anti-dilution rights.
 - This assumes that he has no anti-dilution protection.
 - Anyone investing 25% would expect antidilution provisions.
 - anti-dilution adjustments/measures