请输入您要查询的英文单词:

 

单词 pyxidium
释义

pyxidiumn.

Brit. /pɪkˈsɪdɪəm/, U.S. /pɪkˈsɪdiəm/
Inflections: Plural pyxidia.
Forms: 1800s– pyxidium, 1900s– pixidium.
Origin: A borrowing from Greek. Etymon: Greek πυξίδιον.
Etymology: < Hellenistic Greek πυξίδιον small box < πυξίς box (see pyx n.1) + -ίδιον -idium comb. form. Compare scientific Latin Pyxidium , genus name (1757 or earlier). Compare earlier pyxidated adj.
Botany.
In a flowering plant: a capsule opening by transverse dehiscence, so that the top comes off like the lid of a box.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > seed > seed-vessel or pericarp > [noun] > capsule
heada1398
boll?a1500
bladder1578
bollen1578
bullion1589
bob1615
hive1665
seed box1677
capsule1693
amphora1821
pyxis1821
pyxidium1832
pore capsule1878
1832 Encycl. Brit. V. 42/1 When a capsule opens transversely, it is called a pyxidium.
1857 A. Henfrey Elem. Course Bot. 143 The Pyxidium is a one- or more-celled, many-seeded fruit, the upper part of which falls off like a lid by circumscissile dehiscence.
1909 A. F. M. Johnson Text-bk. Bot. for Students i. iv. 64 In the Scarlet Pimpernel..the top of the capsule comes off as a lid... This form of capsule is called a Pyxidium.
1946 Amer. Jrnl. Bot. 33 681/1 Dehiscence in the pyxidium cannot be accounted for completely by differential drying. It occurs while both halves of the fruit still contain living cells.
1993 A. H. Gentry Woody Plants Northwest S. Amer. (1996) 497 The fruit of most genera [of the Lecythidaceae] is a pixidium, or ‘monkey pot’, with an operculate lid that comes off to release the seeds.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
<
n.1832
随便看

 

英语词典包含1132095条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/3/21 13:15:28