Propylthiouracil, an antithyroid medication, a drug that blocks the production of thyroid hormone by the thyroid gland. PTU is used to treat hyperthyroidism in order to reduce the excessive thyroid activity before surgery and to treat and maintain patients not having surgery. See the entire definition of PTU
Pedagogical Technical Directorate (Ministry of Education system). This is a system of vocational training institutions with dormitory accommodation, for school-aged children who have completed at least six years of standard schooling, and left their children's home.
Portable Terminal Unit. Exactly like a PDU, except has a radio transmitter built in as well. A PTU can send signals to silence alarms, restart pumps, close valves, etc.