Sequoia/sɪˈkwɔɪə/ Definition 1 of 1Pro Tip 1/3Unique to California Sequoias are exclusive to California, highlighting a specific geographical location. If you visit California, try to see the sequoias. Pro Tip 2/3Impressive Size Sequoias are known for their massive size, which invokes a sense of grandeur. The sequoia towered above us, majestically. Pro Tip 3/3Ecosystem Significance Sequoias play a critical role in their natural habitat, often mentioned in environmental contexts. The sequoia is critical for local biodiversity.