There are multiple definitions:

1. distal convoluted tubule(English)

   • CD, CNT

2. discrete cosine transform(English)

   • CCC, DWT, JPEG, KLT, PCT
   • Imaging, Transform
   • https://www.ima…nside_JPEG.aspx

3. deceleration time(English)

   • DFP, ICT, IRT, RR