catechin
noun
cat·e·chin ˈka-tə-ˌkin 
: a crystalline flavonoid compound C15H14O6 or its derivatives having antioxidant properties and used in dyeing and tanning
Example Sentences
Recent Examples on the Web Other small studies have suggested potential beneficial anti-viral activity of gargling with green tea or solutions containing catechins, active ingredients of green tea, or with apple cider vinegar. 
Neal Naito, New York Times, 29 Mar. 2020 Matcha is high in a catechin called EGCG (epigallocatechin gallate), which is believed to have cancer-fighting effects on the body. Alexandra Sifferlin, Time, 8 Mar. 2018 Green or white tea: These drinks contain compounds called catechins, which block the creation of histamines (the chemicals that cause allergy symptoms). Kim Tranell, Redbook, 25 Feb. 2013 Matcha, like other green teas, contains a class of antioxidants called catechins. Alexandra Sifferlin, Time, 8 Mar. 2018 The polyphenols — especially catechins found in green tea — may stimulate the production and activity of specific cells associated with combating viruses. Theresa Shank, Rd, Ldn, Philly.com, 29 Jan. 2018 The catechin found in green tea, EGCG3, lends anti-inflammatory properties, along with fellow antioxidants carnosine and bacopa; squalene helps support barrier function. Laura Regensdorf, Vogue, 29 Sep. 2017 The catechin found in green tea, EGCG3, lends anti-inflammatory properties, along with fellow antioxidants carnosine and bacopa Laura Regensdorf, Vogue, 29 Sep. 2017 And while all the plants in the genus Camellia can produce catechin and caffeine, the species commonly used for tea (sinensis) expresses those particular genes at a much higher levels. Jason Daley, Smithsonian, 3 May 2017 See More
Neal Naito, New York Times, 29 Mar. 2020 Matcha is high in a catechin called EGCG (epigallocatechin gallate), which is believed to have cancer-fighting effects on the body. Alexandra Sifferlin, Time, 8 Mar. 2018 Green or white tea: These drinks contain compounds called catechins, which block the creation of histamines (the chemicals that cause allergy symptoms). Kim Tranell, Redbook, 25 Feb. 2013 Matcha, like other green teas, contains a class of antioxidants called catechins. Alexandra Sifferlin, Time, 8 Mar. 2018 The polyphenols — especially catechins found in green tea — may stimulate the production and activity of specific cells associated with combating viruses. Theresa Shank, Rd, Ldn, Philly.com, 29 Jan. 2018 The catechin found in green tea, EGCG3, lends anti-inflammatory properties, along with fellow antioxidants carnosine and bacopa; squalene helps support barrier function. Laura Regensdorf, Vogue, 29 Sep. 2017 The catechin found in green tea, EGCG3, lends anti-inflammatory properties, along with fellow antioxidants carnosine and bacopa Laura Regensdorf, Vogue, 29 Sep. 2017 And while all the plants in the genus Camellia can produce catechin and caffeine, the species commonly used for tea (sinensis) expresses those particular genes at a much higher levels. Jason Daley, Smithsonian, 3 May 2017 See More Word History
Etymology
International Scientific Vocabulary catechu + -in entry 1
First Known Use
1853, in the meaning defined above
Medical Definition
catechin
noun
cat·e·chin ˈkat-ə-ˌkin
: a crystalline compound C15H14O6 that is related chemically to the flavones, is found in catechu, and is used in dyeing and tanning
also : a derivative of this compound