senna
noun
sen·na ˈse-nə 
1
: any of a genus (Cassia synonym Senna) of leguminous herbs, shrubs, and trees native to warm regions : cassia sense 2
especially : one used medicinally
2
: the dried leaflets or pods of various sennas (especially Cassia angustifolia synonym Senna alexandrina) used as a purgative
Example Sentences
Recent Examples on the Web Other recent blooms include a native grass called needle grama, brittle creosote, desert senna, Acton encelia or brittlebush, and big galleta grass. 
Los Angeles Times, 8 Sep. 2021 Parts of the desert basin received enough rain in July and August that some spring perennials such as desert senna and Acton encelia, or brittlebush, may have a second bloom. Los Angeles Times, 9 Sep. 2021 Metoclopramide, bisacodyl, polyethylene glycol, lactulose and senna leaf extract to treat digestive issues. USA Today, 14 Mar. 2021 In reality, nearly all of these teas contain a herb called senna, which is a natural laxative. Emma Grey Ellis, Wired, 6 Mar. 2020 Made with ingredients such as alma oil, senna leaf extract and cupuacu butter, the mask is used in-shower after shampooing your hair. Atlanta Life, ajc, 18 July 2017 The fitness star quotes a description of Flat Tummy Tea’s main ingredients, including senna, a plant that can have laxative effects (and appears in the brand's Cleanse Tea). Sarah Klein, Health.com, 2 Aug. 2017 The fitness star quotes a description of Flat Tummy Tea’s main ingredients, including senna, a plant that can have laxative effects (and appears in the brand’s Cleanse Tea). Sarah Klein, PEOPLE.com, 2 Aug. 2017 And some of the excitement was because of the new ingredient in the formula, Indian senna seed, which is a natural alternative to hyaluronic acid. Emily Barth Isler, Allure, 18 July 2017 See More
Los Angeles Times, 8 Sep. 2021 Parts of the desert basin received enough rain in July and August that some spring perennials such as desert senna and Acton encelia, or brittlebush, may have a second bloom. Los Angeles Times, 9 Sep. 2021 Metoclopramide, bisacodyl, polyethylene glycol, lactulose and senna leaf extract to treat digestive issues. USA Today, 14 Mar. 2021 In reality, nearly all of these teas contain a herb called senna, which is a natural laxative. Emma Grey Ellis, Wired, 6 Mar. 2020 Made with ingredients such as alma oil, senna leaf extract and cupuacu butter, the mask is used in-shower after shampooing your hair. Atlanta Life, ajc, 18 July 2017 The fitness star quotes a description of Flat Tummy Tea’s main ingredients, including senna, a plant that can have laxative effects (and appears in the brand's Cleanse Tea). Sarah Klein, Health.com, 2 Aug. 2017 The fitness star quotes a description of Flat Tummy Tea’s main ingredients, including senna, a plant that can have laxative effects (and appears in the brand’s Cleanse Tea). Sarah Klein, PEOPLE.com, 2 Aug. 2017 And some of the excitement was because of the new ingredient in the formula, Indian senna seed, which is a natural alternative to hyaluronic acid. Emily Barth Isler, Allure, 18 July 2017 See More Word History
Etymology
New Latin, from Arabic sanā
First Known Use
1543, in the meaning defined at sense 1
Medical Definition
senna
noun
sen·na ˈsen-ə
1
: any of a genus (Cassia synonym Senna) of leguminous plants of warm regions
especially : one used medicinally
2
: the dried leaflets or pods of various sennas (especially Cassia angustifolia synonym Senna alexandrina) used as a purgative