1.  pellucidity(n = noun.attribute) clarity, clearness, limpidity, lucidity, lucidness - free from obscurity and easy to understand; the comprehensibility of clear expression;
is a kind of comprehensibility, understandability
has particulars: monosemy, focus, clearcutness, preciseness, perspicuity, perspicuousness, plainness, unambiguity, unequivocalness, explicitness
Derived form adjective pellucid₂

2.  pellucidity(n = noun.attribute) limpidity, pellucidness - passing light without diffusion or distortion;
is a kind of transparence, transparency, transparentness
Derived form adjective pellucid₁

   The quality or state of being pellucid; transparency; translucency; clearness; as, the pellucidity of the air. Locke. [1913 Webster]

N  transparence, transparency, clarity, translucence, translucency, diaphaneity, lucidity, pellucidity, limpidity, fluorescence, transillumination, translumination, transparent medium, glass, crystal, lymph, vitrite, water, transparent, pellucid, lucid, diaphanous, translucent, tralucent, relucent, limpid, clear, serene, crystalline, clear as crystal, vitreous, transpicuous, glassy, hyaline, hyaloid, vitreform.