The term for a plant that lives for more than two years is "perennial." Perennials can survive through multiple growing seasons, often exhibiting growth during warm months and entering a dormant stage during colder seasons. These plants can be herbaceous, dying back to the ground each winter, or woody, maintaining their structure across seasons. Perennials typically have deep root systems, allowing them to access water and nutrients more effectively and survive in various environmental conditions. Their longevity and resilience make them essential in ecosystems and for gardening.