1916, in the meaning defined above
phenolphthalein
phenol red
phenolsulfonephthalein
“Phenol red.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phenol%20red. Accessed 26 Nov. 2024.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
See Definitions and Examples »
Get Word of the Day daily email!
Share