The term for the stage in the cell cycle where the cell is not actively dividing is called interphase. Interphase is a critical period that encompasses several phases, including G1 (gap 1), S (synthesis), and G2 (gap 2). During interphase, the cell grows, replicates its DNA, and prepares for mitosis. This stage is vital for cellular health and function, as it ensures that cells are adequately prepared for division. Interphase constitutes a significant portion of the cell cycle, typically lasting longer than the division phase.