Or maybe the subjects have ___, a condition in which letters and numbers are perceived as colors

Usage examples of synesthesia.

Like Nabokov she had a tendency to synesthesia, a delight in easily overlooked trifles, a sense of wonder at the world.

The weight that held me to bed and floor seemed, by an extraordinary synesthesia, political and not physical.

That was fine with Jimmy, because a bit of synesthesia never went amiss.

One other thing it had done: opened the door to the reading of auras, the mental trick that takes perception of heat and odor and body language and through a kind of synesthesia creates the impression of color.

I exploded into total synesthesia, into an orgasm that blasted my eyes with color and my ears with sound, a total experience like nothing I had ever known before, claiming all of me, destroying me and re-creating me out of nothingness.

We may have to trick ourselves into surprise by giving ourselves assignments that require mixing the senses, or by seeking out literary examples of synesthesia to use as models.

The light strengthened, and at length, trembling with synesthesia, Tahquil stepped from the cave-mouth into the open air of a surreal landscape.

The microneural surgery should at least have reduced his terrifying sensory synesthesia.

Koans of synesthesia, to break apart the unity of the sense that bars the time sense.