请输入您要查询的英文单词:

 

单词 pollen cell
释义

pollen celln.

Brit. /ˈpɒlən sɛl/, U.S. /ˈpɑlən ˌsɛl/
Origin: Formed within English, by compounding. Etymons: pollen n., cell n.1
Etymology: < pollen n. + cell n.1
1. Botany. A pollen sac; (also) a cavity or duct formed by fused anthers and filaments. Obsolete.
ΚΠ
1834 J. Lindley in Rep. Brit. Assoc. Advancem. Sci. 1833 44 You may observe on each side of the medial line of a transverse section of a lobe of an anther, a collection of cellules rather larger than the remainder:..it is here that the pollen is engendered; such cells are therefore called pollen-cells.
1839 J. Lindley Introd. Bot. (ed. 3) i. ii. 183 The pollen-cells had become larger; their granules were so much multiplied that they were grouped and packed in opaque masses.
1879 Amer. Naturalist 13 4 The end of the style with its hairs forms the bottom of the pollen-cell.
2. Botany. A pollen grain; a cell which develops into a pollen grain, or which forms part of an aggregation of pollen grains.
ΘΚΠ
the world > plants > part of plant > cell or aggregate tissue > [noun] > cell > types of > other types
bast cell1842
basal cell1846
pollen cell1857
companion cell1859
segment1862
pollen mother cell?1870
sextant1875
transfusion cell1875
idioblast1882
trichoblast1882
symplast1894
megasporocyte1924
oat cell1940
heterokaryon1945
1857 A. Henfrey Elem. Course Bot. §928 Compound pollen-grains, consisting of a number of pollen-cells permanently coherent.
1875 A. W. Bennett & W. T. T. Dyer tr. J. von Sachs Text-bk. Bot. 440 The four young pollen-cells are now freed by the rapid absorption of the cell-wall which surrounds and separates them.
1904 Bot. Gaz. 38 208 In examining so many pollen cells it was not surprising that a good many abnormal forms were met with.
1998 Science 24 July 503/2 A preliminary search for mutant pollen cells that don't adhere properly suggests that structural defect in the cell wall ruin the attraction.
3. Bee-keeping. A cell in a honeycomb in which pollen is stored. More fully pollen storage cell. rare.
ΘΚΠ
the world > animals > invertebrates > phylum Arthropoda > class Insecta > order Hymenoptera > [noun] > suborder Apocrita, Petiolata, or Heterophaga > group Aculeata (stinging) > superfamily Apoidea (bees) > honeycomb > cell in
cella1398
room1579
cabin1611
working hole1735
pollen cell1888
1888 Chambers's Encycl. II. 22/2 A pollen-cell is (frequently at least) sealed with honey, and over this a thin cream-like pellicle is formed.
1954 C. G. Butler World of Honeybee pl. 35. (caption) Worker bees on pollen storage cells.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
<
n.1834
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:2024/12/23 3:02:38