'Visualizer' definitions:

Definition of 'visualizer'

From: WordNet
noun
One whose prevailing mental imagery is visual [syn: visualizer, visualiser]

Definition of 'Visualizer'

From: GCIDE
  • Visualizer \Vis"u*al*iz`er\, n. One who visualizes or is proficient in visualization; esp. (Physiol.), one whose mental imagery is prevailingly visualization. [Webster 1913 Suppl.]