No, but there is a conventional definition.
You DID mention convention.
( Mu Dinofiddler, Mon 3 Feb 2014, 16:43, archived)

Eh?
The conventional definition is 'it looks kind of white'.

Given the variation in human eyes, I'm dubious that you're going to come up with any useful pedantry here.
( Dr. Shambolic je suis charlie, Mon 3 Feb 2014, 16:49, archived)

I've already explained my position above.
You're free to hold your own beliefs.
( Mu Dinofiddler, Mon 3 Feb 2014, 16:51, archived)

Very kind.
I believe you should have paid more attention at school.
( Dr. Shambolic je suis charlie, Mon 3 Feb 2014, 16:54, archived)

this isn't a belief thing, this is a you being wrong about a thing thing

( Sir Sand GOBLIN ^popular page dis, Mon 3 Feb 2014, 17:04, archived)

I'm not wrong, I just didn't want to be drawn into a "reiterate yourself 10,000 times for the guy who's never going to agree with you even if you have a signed affidavit from god/hawking/his mother" argument.

( Mu Dinofiddler, Mon 3 Feb 2014, 17:09, archived)

no, you are wrong and the sooner you man up and face the facts the better for the good of this forum
be the better man here mu
( Sir Sand GOBLIN ^popular page dis, Mon 3 Feb 2014, 17:37, archived)

Being wrong suits you.
You should do it more often. If that were possible.
( Dr. Shambolic je suis charlie, Mon 3 Feb 2014, 18:18, archived)