ETYM New Lat., from Greek, hailstone, pimple.
1. Basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined.
2. One of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell.
Glutinous mass of transparent albumen supporting the yolk inside birds' eggs. The chalaza is formed as the egg slowly passes down the oviduct, when it also acquires its coiled structure.