The term "Harold Kroto" refers to a specific person and is a proper noun, so it does not have the same kinds of meanings, synonyms, or usage as regular English words. Let me explain who he is and give you some context.
Harold Kroto is a British chemist, which means he is someone who studies chemistry, the science that deals with the composition, properties, and reactions of substances. He was born in 1939 and is best known for his work with two other scientists, Robert Curl and Richard Smalley. Together, they discovered a new form of carbon called "fullerenes." Fullerenes are molecules made entirely of carbon, in which the carbon atoms are arranged in a hollow sphere, ellipsoid, or tube. This discovery was significant because it opened up a new area of research in chemistry.
Harold Kroto is an important figure in chemistry, known for discovering fullerenes.