'Chalaza' definitions:
Definition of 'chalaza'
(from WordNet)
noun
Basal part of a plant ovule opposite the micropyle; where integument and nucellus are joined
noun
One of two spiral bands of tissue connecting the egg yolk to the enclosing membrane at either end of the shell
Definition of 'Chalaza'
From: GCIDE
- Chalaza \Cha*la"za\, n.; pl. E. Chalazas, L. Chalaz[ae]. [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. [1913 Webster]
- 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. [1913 Webster]