There are multiple definitions:

1. trabecular-posterior iris surface angle(English)

   • the angle between the posterior corneal surface and the posterior iris surface
   • ACD, APAC, APACG, CPAC, CPACG, ICPD, IRD, SCPA, TAIA, TCA, TCPD
   • Ophthalmology
   • https://doi.org…al.pone.0193006

2. time to peak inspiratory amplitude [of the diaphragm](English)

   • DT, DTF, TF
   • Pulmonology, Intensive care medicine, Ultrasound
   • https://doi.org…2890-018-0739-9