(chemistry) Initialism of tetraethyltin. / (computing) Initialism of transparency-enhancing tool. / (medicine) Initialism of thymic epithelial tumor. / (physics) Initialism of targeted energy transfer.

Alternative form of teth (“Semitic letter”).

(informal, pharmacology) Clipping of tetracycline.

(uncountable, informal, medicine) The tetralogy of Fallot. / (countable, informal, medicine) A patient with tetralogy of Fallot.

(informal, horticulture) A tetraploid plant cultivar (iris, daylily etc.).

(geometry, engineering) A tetrahedron; a tetrahedral finite element.

(geometry, engineering) Tetrahedral.

(informal, numismatics) Clipping of tetradrachm.

(informal, fishkeeping) A tetra (freshwater fish).

(informal, medicine) Clipping of tetanus.