Cha*la"za (?), n.; pl. E. Chalazas, L. Chalazae (#). [NL., fr. Gr. hail, pimple.]
1. Bot.
The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus.
2. Biol.
A spiral band of thickened albuminous substance which exists in the white of the bird's egg, and serves to maintain the yolk in its position; the treadle.
© Webster 1913.