hesperidin
noun
hes·per·i·din he-ˈsper-ə-dən 
: a crystalline glycoside C28H34O15 found in most citrus fruits and especially in orange peel
Example Sentences
Recent Examples on the Web The teeny-tiny light reflectors in the formula illuminate skin on contact, while retinol and something called alpha glucosyl hesperidin brighten under-eyes and smooth wrinkles over time. 
Sophie Wirt, Allure, 8 Sep. 2017
Sophie Wirt, Allure, 8 Sep. 2017 Word History
Etymology
New Latin hesperidium orange, from Latin Hesperides
First Known Use
1838, in the meaning defined above
Medical Definition
hesperidin
noun
hes·per·i·din he-ˈsper-əd-ən
: a crystalline glycoside C28H34O15 found in most citrus fruits and especially in orange peel