What does TDZ stand for?

Thioridazine - Tranquilizer

Thymus-Dependent Zone - Hematology (MAE)

Toledo, OH - Location identifier - FAA (FAAL)

Torpedo Danger Zone (NVT)

Total Danger Zone (SAUS)

Touchdown - Aviation (FAAC)

Touchdown Zone - Aviation (PIPO)

Trade Development Zone (ADA)

Transcontinental Dislocation Zone - Geology

Tridel Enterprises, Inc. - Toronto Stock Exchange symbol