A stomatocyte is a type of red blood cell that has a mouth-like or slit-like shape. Other synonyms for this word include mouth cell, cleft cell, and spherostomatocyte. These terms all refer to the same basic structure and function of the stomatocyte, which is important in maintaining the integrity and flexibility of the red blood cell membrane. Stomatocytes can occur naturally, as in some hereditary anemias, or can be induced by exposure to a range of chemicals or drugs. Understanding the different synonyms for stomatocyte can help researchers and healthcare professionals accurately describe and diagnose related conditions.