chem.

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
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.
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.

Adjective

chemical (not comparable)

1. Of or relating to chemistry.
   • chemical experiments
2. Of or relating to a material or processes not commonly found in nature or in a particular product.
3. (obsolete) Of or relating to alchemy.

See all 6 meanings of chemical