"Corns varieties with hard texture show a higher **vitreousity** as compared with those semi-dent and corn dent varieties"
(http://www.scielo.br/scielo.php?pid=S1413-70542007000300036&...

"Simmonds D.H.: Chemical basic of hardness and **vitreousity in the wheat kernel**. Bakers Dig., 48, 16-18, 1992."
(http://www.acta-agrophysica.org/artykuly/acta_agrophysica/Ac...

"Higher values of kernel density observed with the o2-lf; +Bg
derivatives most likely resulted from the action of polygenic modifiers
which conditioned higher **endosperm vitreousity**"
(http://www.agron.missouri.edu/mnl/75/mnl75.pdf)