TNZ

TNZ can refer to:
 * tinidazole, an anti-parasitic drug
 * the thermal neutral zone, the temperature range that a warm-blooded organism can tolerate
 * an informal abbreviation for Tanzania
 * the Ten'edn language spoken in Thailand and Malaysia
 * Ti–13Nb–13Zr, a metal that is an alloy of titanium, niobium, and zirconium
 * Transit New Zealand, a former New Zealand government agency
 * Team New Zealand, in some sports events
 * Team New Zealand of yachting