varnish
semen should be a thick clear substance
I think this is probably the aqueous humour, which is a thick watery substance behind the cornea but in front of the lens.
Clear and thick...clear is broth-like, thick would be like a chowder.
Maple syrup is a thick liquid that pours out slowly. Honey is another example of a thick substance that pours out in a slow stream. Tar is a thick black substance that also pours out slowly.
Cytoplasm
The prostate gland.
Adjectives that describes a "Diamond" are: Sparkling, shiny, hard, solid, expensive, beautiful, etc.
the mass of the substance divided by its volume. how thick a brain beez.
: )
It is a white, thick substance
Mucus
I am not sure, but you should go see a doctor. Especially if it is frequent or painfull. Sounds like it's not just slime from your throat and lungs...