外部链接:    leo英德   dict有道 百度搜索百度 google谷歌 google图片 wiki维基 百度百科百科   

 bract [brækt]   添加此单词到默认生词本
n. 苞片, 苞

[医] 苞, 苞片


  1. In later June, stamen primodium was differentiated in the bract of male inflorescence and the differentiation of bract was generated in female inflorescence.
    6月中下旬,雄花序苞片上分化出雄蕊原基,雌花序分化出苞片。
  2. For example, the spiral arrangement of scale-bract complexes on ovule-bearing pine cones, where the female reproductive organs of conifers are located, is important to the production of airflow patterns that spiral over the co
    例如,带有胚珠的松球的鳞苞综合体的螺旋状安排,亦即松柏目植物雌性殖器官的所在位置,对于气流模式的形成与产生殊为重要,而这些气流模式在松球的表现盘旋上升,从而把在空气中飞行的花粉从一个鳞苞传播至下一个鳞苞。


bract
[ noun ]
a modified leaf or leaflike part just below and protecting an inflorescence
<noun.plant>


Bract \Bract\, n. [See {Bractea}.] (Bot.)
(a) A leaf, usually smaller than the true leaves of a plant,
from the axil of which a flower stalk arises.
(b) Any modified leaf, or scale, on a flower stalk or at the
base of a flower.

Note: Bracts are often inconspicuous, but sometimes large and
showy, or highly colored, as in many cactaceous plants.
The spathes of aroid plants are conspicuous forms of
bracts.
||

加入收藏 本地收藏 百度搜藏 QQ书签 美味书签 Google书签 Mister Wong
您正在访问的是
中国词汇量第二的英语词典
更多精彩,登录后发现......
验证码看不清,请点击刷新
  注册