Synesthesia

We recently learned about a rare condition called "synesthesia".  Using internet research, explain each of the terms below:

1. Synesthesia

2. grapheme-color synesthesia

3. ordinal-linguistic personification   

4. number-form synesthesia

5. sound-color synesthesia

6. lexical-gustatory synesthesia

Be sure to explain each in as much detail as necessary - site your sources for each answer and post one picture for each term.  This assignment is due by Sunday, March 6th.