chemistry

Noun

chemistry (countable and uncountable, plural chemistries)

1. (uncountable) The branch of natural science that deals with the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules.
2. (countable) An application of chemical theory and method to a particular substance.
   • Learning the very complicated chemistries necessary to reproduce reality into a picture using light1979 December 29, Tia Cross, “Lesbian Family Album”, in Gay Community News, volume 7, number 23, page 14
   • The aquatic chemistries of iron and manganese are similar; this “is reflected geologically in their common association in rocks of all kinds” (Bortleson and Lee, 1974).1984, North American Lake Management Society, Lake and Reservoir Management: Proceedings of the Third Annual Conference, page 250
3. The chemical properties and reactions of a particular organism, environment etc.
   • But some microbes manage to move to new organs to get inside tumors. It’s possible that the particular chemistry inside a tumor, such as its level of oxygen, helps determine which microbes will thrive there.2022 September 29, Carl Zimmer, “A New Approach to Spotting Tumors: Look for Their Microbes”, in The New York Times
4. (informal) The mutual attraction between two people; rapport.
   • The on-screen chemistry between the lead actors led many viewers to believe they were a couple in real life.
   • The coach attributed their losses to poor team chemistry.
5. (countable, informal, proscribed, sometimes) A blood test to measure the amount of various components of the serum (such as electrolytes, creatinine, and glucose).
   • Diagnosis is presumptive by history and physical examination and is confirmed by chemistries.