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 aril ['ærɪl]   添加此单词到默认生词本
n. 假种皮

[医] 假种皮


  1. Testa of seed consists of four layers which becomes hard and woody after ripening. The presence of aril outside the testa may increase the buoyancy of the fruit.
    芡种子的种皮共有四层,成熟后坚硬,种皮外有假种皮,有增加浮力的作用。


aril
[ noun ]
fleshy and usually brightly colored cover of some seeds that develops from the ovule stalk and partially or entirely envelopes the seed
<noun.plant>


Aril \Ar"il\, ||Arillus \A*ril"lus\, n. [From LL. arilli dry
grapes, perh. fr. L. aridus dry: cf. F,. arille.] (Bot.)
A exterior covering, forming a false coat or appendage to a
seed, as the loose, transparent bag inclosing the seed of the
white water lily. The mace of the nutmeg is also an aril.
--Gray.

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