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(), n.; pl. E. Chalazas, L. Chalaz (). [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. スポンサード リンク
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