1) Human eye anatomy 
In anatomy, a crystallin is a water-soluble structural protein found in the lens and the cornea of the eye accounting for the transparency of the structure. It has also been identified in other places such as the heart, and in aggressive breast cancer tumors. Since it has been shown that lens injury may promote nerve regeneration, crystallin has b...
• (n.) See Gobulin.
<cell biology> Major proteins of the vertebrate lens. Range from high MW oligomeric species to low MW monomeric species. Immunological cross reactivity suggests that the sequences of crystallin sub units are relatively highly conserved in evolution. ... (18 Nov 1997) ... 
(kris-tal´in) a globulin in the crystalline lens of the eye.
Crys'tal·lin noun (Physiol. Chem.) See Gobulin . 
Type: Term Pronunciation: kris′tă-lin Definitions: 1. One of several water-soluble proteins found in the lens of the eye; α (an embryonic single protein), β, and γ varieties (based on precipitibility) are known. Reptiles and birds have a ΄-crystalline as well. ε-Crystallin is the same as lactate dehydrogenase. &n...