sort by best latest
An interesting question ...
My guess is 'shadow'
You can help the HubPages community highlight top quality content by ranking this answer up or down.
I would've never guessed this! The answer is the pupil of an eye.
Copyright © 2017 HubPages Inc. and respective owners.
Other product and company names shown may be trademarks of their respective owners.
HubPages® is a registered Service Mark of HubPages, Inc.
HubPages and Hubbers (authors) may earn revenue on this page based on affiliate relationships and advertisements with partners including Amazon, Google, and others.