Sequoia \Se*quoi"a\, n. [NL. So called by Dr. Endlicher in honor of Sequoyah, who invented the Cherokee alphabet.] (Bot.) A genus of coniferous trees, consisting of two species, {Sequoia Washingtoniana}, syn. {S. gigantea}, the ``big tree'' of California, and {S. sempervirens}, the redwood, both of which attain an immense height.