Testudinate -us: resembling the shell of a tortoise.
Tetra-: four: a combining form.
Tetrachaetae: applied to those Diptera in which the mouth structures consist of four longitudinal blades or piercing structures.
Tetradactyle: with four fingers or finger-like processes.
Tetragonal: having four sides or angles: quadrangular.
Tetramera: applied to Coleoptera with four-jointed tarsi.
Tetramerous: having four-jointed tarsi.
Tetrapoda: applied to those butterflies in which the anterior legs are atrophied in whole or in part.
Tetraptera: a term proposed for all insects with four naked, membranous reticulated wings.
Thamnophilous: applied to species living in thickets or dense shrubbery.