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In the real world, squill is the common name of a flowering plant native to Europe, Asia, and Africa, and "squill liquid extract" is used as an ingredient in cough medicines. It is not known whether the writers used the name as an intentional gag, or if it was used by coincidence.
Removed the above statement as an uncited reference.--31dot 10:50, April 17, 2010 (UTC)