noun Download 🔗Share (rare outside entomology) The mesial plane dividing the body into similar right and left halves. Examples : "The surgeon carefully marked the patient's abdomen along the meson before making the incision, ensuring symmetrical access for the procedure. " anatomy body biology insect Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share A member of a group of subatomic particles having a mass intermediate between electrons and protons. (The most easily detected mesons fit this definition.) Examples : "Physicists study mesons to understand the forces that hold the nucleus of an atom together. " physics mass Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share (now specifically) An elementary particle that is composed of a quark and an antiquark, such as a kaon or pion. (Mesons composed of rarer quarks are much heavier.) Examples : "Physicists study the properties of a meson, a type of particle made of a quark and an antiquark. " physics element Chat with AIVocabulary GamePractice Reading