masseter
noun
mas·se·ter mə-ˈsē-tər 
ma-
: a large muscle that raises the lower jaw and assists in mastication
masseteric
ˌma-sə-ˈter-ik
adjective 
Example Sentences
Recent Examples on the Web First, a crash course in masseter Botox for the uninitiated. 
Roxanne Adamiyatt, Town & Country, 22 June 2022 Injecting Botox into the masseter muscle, which connects your cheekbone to your lower jaw bone, temporarily paralyzes the muscle and can relieve tension headaches and other jaw pain. Taylore Glynn, Marie Claire, 12 Sep. 2021 It's been much longer than two weeks since my last round of injectables; in fact, everything has since dissolved since my most recent sessions of cheek filler and masseter Botox. Sarah Wu, Glamour, 6 Oct. 2020 Austin-Dright said the pellet lodged in the masseter muscle and that her son cannot open his jaw. Rick Hurd, The Mercury News, 14 Aug. 2019 My colleagues seem to particularly love masseter Botox (sometimes referred to as jaw Botox), a treatment with twofold results. Sarah Wu, Glamour, 28 May 2019 There are four injections total, two on each side, directed straight into your masseter muscle. Sarah Wu, Glamour, 28 May 2019 See More
Roxanne Adamiyatt, Town & Country, 22 June 2022 Injecting Botox into the masseter muscle, which connects your cheekbone to your lower jaw bone, temporarily paralyzes the muscle and can relieve tension headaches and other jaw pain. Taylore Glynn, Marie Claire, 12 Sep. 2021 It's been much longer than two weeks since my last round of injectables; in fact, everything has since dissolved since my most recent sessions of cheek filler and masseter Botox. Sarah Wu, Glamour, 6 Oct. 2020 Austin-Dright said the pellet lodged in the masseter muscle and that her son cannot open his jaw. Rick Hurd, The Mercury News, 14 Aug. 2019 My colleagues seem to particularly love masseter Botox (sometimes referred to as jaw Botox), a treatment with twofold results. Sarah Wu, Glamour, 28 May 2019 There are four injections total, two on each side, directed straight into your masseter muscle. Sarah Wu, Glamour, 28 May 2019 See More Word History
Etymology
New Latin, from Greek masētēr, from masasthai to chew — more at mandible
First Known Use
1578, in the meaning defined above
Medical Definition
masseter
noun
mas·se·ter mə-ˈsēt-ər, ma-
: a large muscle that raises the lower jaw and assists in mastication, arises from the zygomatic arch and the zygomatic process of the temporal bone, and is inserted into the mandibular ramus and gonial angle