The Free On-line Dictionary of Computing (19 January 2023):

Single Instruction/Multiple Data
SIMD
Single Instruction Multiple Data

   (SIMD) (Or "data parallel") The classification under Flynn's
   taxonomy for a parallel processor where many processing
   elements (functional units) perform the same operations on
   different data.  There is often a central controller which
   broadcasts the instruction stream to all the processing
   elements.

   Contrast Multiple Instruction/Multiple Data.

   (1994-11-04)