The term "dark reaction" refers to the biochemical processes that occur in plants during photosynthesis that do not require sunlight. There are several synonyms for this phrase, including "Calvin cycle," named after its discoverer Melvin Calvin, "light-independent reaction," and "carbon-fixation cycle." The Calvin cycle takes place in the stroma of chloroplasts and converts carbon dioxide into organic compounds through a series of enzyme-mediated reactions. During the light-independent reaction, ATP and NADPH, which are produced in the light-dependent reaction, are utilized to fix carbon in order to produce the energy-rich molecule, glucose. Understanding the dark reaction and its synonyms is crucial in advancing our knowledge of plant growth and survival.