👉 The word 'Xmit', a term coined in the 1930s, refers to an object or substance that is used in making certain substances. In chemistry and physics, it's commonly referred to as a catalyst or an aid in reaction processes. It acts like a "helper" (a synonym for "support") in chemical reactions where its presence can speed up the process, often allowing for more efficient and effective results. Xmit could also refer to a type of fuel that is used in car engines but is not fuel itself, but rather serves as a catalyst or an aid in the combustion process.