T8 or T-8 may refer to the following: Measurement T8, a Torx screwhead size T8, a 1 inch fluorescent lamp size A tornado intensity rating on the TORRO scale Biology The 8th thoracic vertebra The T8 spinal nerve Transportation Trikke8, a scooter-like vehicle An OS T1000 train class model, used on the Oslo Metro Airport & South Line, a rail service in Sydney numbered T8 Île-de-France tramway Line 8, one of the Tramways in Île-de-France Other One of the Hong Kong Tropical Cyclone Warning Signals used by the Hong Kong Observatory Tekken 8, an upcoming fighting game The International Telecommunication Union prefix for Palau YouTube Channel based on The Lion King See also 8T (disambiguation)