chalaza 的定义
plural cha·la·zas, cha·la·zae [kuh-ley-zee]. /kəˈleɪ zi/.
- Zoology. one of the two albuminous twisted cords which fasten an egg yolk to the shell membrane.
- Botany. the point of an ovule or seed where the integuments are united to the nucellus.
更多chalaza例句
- He considers the centre of the hilum as the base, and the chalaza, where it exists, as the natural apex of the seed.
- Seeds larger than Aestivalis, pear-shaped; chalaza roundish.
- Seeds large, usually slightly notched; chalaza rather narrow; raphe a groove.
- Seeds small to very small, slightly notched on top; chalaza depressed, oblong-oval; raphe broad, slightly distinct.
- Seeds two to three of medium size; chalaza oval in shape, slightly distinct; raphe flat, usually inconspicuous, rarely prominent.