American Heritage Dictionary
(1)
Century Dictionary
(1)
GNU Webster's 1913
WordNet
(1)
Elsewhere on the web
The rationale for a 'cognitive vaccine' approach is as follows: Trauma flashbacks are sensory-perceptual, visuospatial mental images.— ScienceBlogs Channel : Life Science
In particular, we suggest that visuospatial tasks will be useful in this regard according to the following rationale: (1) trauma flashbacks are sensory-perceptual images with visuospatial components the neurobiology of memory consolidation suggests a 6-hr time frame post-event within which memories are malleable— PLoS ONE Alerts: New Articles
It is information from sensory-perceptual processing that provides the foundation for flashback images.— PLoS ONE Alerts: New Articles

Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word several times a year.