the.com/inkblot

means A shapeless splotch of ink, especially one folded into a symmetrical pattern and used to prompt someone to describe what they see in it.

from Straightforward compound of 'ink' plus 'blot,' the latter from Middle English for a spot or stain, origin itself murky and disputed — fittingly, even the word for a smudge has a smudged past. The word surged into common use alongside the Rorschach test, devised by Swiss psychiatrist Hermann Rorschach in the early 20th century, who discovered almost by accident that symmetrical inkblots made good mirrors for the mind.