TID

TID or tid may refer to:


 * Thermionic detector, a detector used in gas chromatography based on the principle of ionization and measuring a change in electron flux
 * Total ionizing dose (related to ionizing radiation)
 * Transient ischemic dilation, a finding on a nuclear cardiology test consistent with coronary artery disease
 * TID class tug, a British tugboat design of World War II
 * TID (musician)a musician from Tanzania
 * Traffic identifieran identifier used for traffic flows in 802.11 wireless local-area networks
 * ter in die, Latin for three times daily; usually refers to prescription medication dosage (e.g. TID)
 * Tag identification memory, in a Gen 2 RFID tag, this consists of memory about the tag itself, such as the tag ID
 * Transportation improvement district
 * Travelling Ionospheric Disturbancea type of Ionospheric perturbation
 * Truncated dodecahedron
 * Travel itinerary directory
 * Tobacco Induced Diseasesa peer reviewed journal