big tree

WordReference Random House Unabridged Dictionary of American English © 2025

big′ tree′, 

1. Plant Biology a large coniferous tree, Sequoiadendron giganteum (formerly Sequoia gigantea), of California, often reaching 300 ft. (91 m) in height, having reddish-brown bark, scalelike blue-green leaves, and bearing large elliptical cones. Also called giant sequoia. Cf. sequoia. 

• 1850–55, American.

Collins Concise English Dictionary © HarperCollins Publishers::

big tree noun

1. a giant Californian coniferous tree, Sequoiadendron giganteum, with a wide tapering trunk and thick spongy bark: family Taxodiaceae. It often reaches a height of 90 metres
   Also called: giant sequoia, wellingtonia
   See also sequoia