Wiktionary
dictyostelid
n. Any slime mould, of the order ''Dictyosteliida'', that exist either as individual amoebae or aggregated as a pseudoplasmodium
Wikipedia
Dictyostelid
The dictyostelids (Dictyostelia, ICZN, or Dictyosteliomycetes, ICBN) are a group of cellular slime molds, or social amoebae.