T. grandis

T. grandis may refer to:
 * Tectona grandis, the teak, a tropical hardwood tree species native to south and southeast Asia, mainly India, Indonesia, Malaysia and Myanmar
 * Tenedos grandis, a spider species in the genus Tenedos
 * Terataspis grandis, a huge trilobite species from the Devonian that lived in a shallow sea in what is now New York State and Ontario
 * Tillandsia grandis, a synonym of Pseudalcantarea grandis, a plant species native to Mexico and Central America
 * Tmarus grandis, a spider species in the genus Tmarus found in Brazil
 * Toromys grandis, the giant tree rat or white-faced tree rat, a spiny rat species found in Brazil
 * Trachymene grandis, a plant species in the genus Trachymene