element or compound that loses (or "donates") an electron to another chemical species in a redox chemical reaction; losing electrons,oxidized,"reduces" (are "oxidized" by) oxidizers (oxidizing agents)
In chemistry, a reducing agent (also known as a reductant, reducer, or electron donor) is a chemical species that "donates" an electron to an electron recipient (called the oxidizing agent, oxidant, oxidizer, or electron acceptor).
Examples of substances that are common reducing agents include hydrogen, carbon monoxide, the alkali metals, formic acid, oxalic acid, and sulfite compounds.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).