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Treadle :: Treadle (n.) The chalaza of a bird's egg; the tread.

Chalaze :: Chalaze (n.) Same as Chalaza.

Ovule :: Ovule (n.) The rudiment of a seed. It grows from a placenta, and consists of a soft nucleus within two delicate coatings. The attached base of the ovule is the hilum, the coatings are united with the nucleus at the chalaza, and their minute orifice is the foramen..

Chalaziferous :: Chalaziferous (a.) Having or bearing chalazas.

Chalazae :: Chalazae (pl. ) of Chalaz.

Orthotropous :: Orthotropous (a.) Having the axis of an ovule or seed straight from the hilum and chalaza to the orifice or the micropyle; atropous.

Chalaza :: Chalaza (n.) 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..

Chalazal :: Chalazal (a.) Of or pertaining to the chalaza.

Anatropous :: Anatropous (a.) Having the ovule inverted at an early period in its development, so that the chalaza is as the apparent apex; -- opposed to orthotropous..

Chalazas :: Chalazas (pl. ) of Chalaz.

Hemitropous :: Hemitropous (a.) Having the raphe terminating about half way between the chalaza and the orifice; amphitropous; -- said of an ovule.

Chalaza :: Chalaza (n.) The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus..

Omphalode :: Omphalode (n.) The central part of the hilum of a seed, through which the nutrient vessels pass into the rhaphe or the chalaza; -- called also omphalodium..

Tread :: Tread (n.) The chalaza of a bird's egg; the treadle.

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