Plastids are specialized organelles found in plant cells that perform various functions, including photosynthesis and storage of pigments and starch. Synonyms for the term plastid used in biology may include stroma, cytoplasmic inclusion, chloroplast, and chromoplast. Stroma refers to the fluid-filled space within the chloroplast, while cytoplasmic inclusions are particles found in the cytoplasm of cells. Chloroplasts are plastids responsible for photosynthesis, and chromoplasts are plastids responsible for storing pigments like carotenoids. These synonyms help scientists more clearly communicate about the different types of plastids found in plant cells and their specific functions.