cotyledon
[`kɑtl.'idən]
n. , 寇顿属植

[医] 绒毛; (植)

1. Two cotyledons have come out from the seedling.
   苗两片。
2. Its cotyledon node zone is telome elongation type.
   :日葵幼苗型顶枝伸型。
3. Among cotyledon, petiole of cotyledon, hypocotyl, and radicle, hypocotyl has the most responsive explants to2,4- D.
   、柄、胚胚根者,胚2,4-D应状况。

cotyledon
[ noun ]
embryonic leaf in seed-bearing plants
<noun.plant>




Cotyledon \Cot`y*le"don\ (k?t`?-l?"d?n), n. [Gr.??? a cupshaped
hollow, fr. ???. See {Cotyle}.]
1. (Anat.) One of the patches of villi found in some forms of
placenta.

2. (Bot.) A leaf borne by the caulicle or radicle of an
embryo; a seed leaf.

Note: Many plants, as the bean and the maple, have two
cotyledons, the grasses only one, and pines have
several. In one African plant ({Welwitschia}) the
cotyledons are permanent and grow to immense
proportions.