vitreous humor
US /ˈvɪt.ri.əs ˈhjuː.mər/
UK /ˈvɪt.ri.əs ˈhjuː.mər/

1.
the transparent gelatinous tissue filling the eyeball behind the lens
:
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The surgeon carefully removed a portion of the vitreous humor during the eye operation.
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Floaters in your vision are often caused by small clumps within the vitreous humor.