phantasmata

/fænˈtæzmətə/
noun
  1. Plural of 'phantasm'; things that appear to the mind but are not real, such as ghosts, illusions, or imaginary visions.
    • The old castle was said to be haunted by phantasmata that appeared at midnight.
    • In his feverish state, he saw phantasmata dancing in the shadows.
    • The poet wrote about the phantasmata of love and loss that haunted his dreams.