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diatom

XDict

n. 矽藻类

PyDict

矽藻类

WordNet (r) 3.0 (2006) (WordNet)

diatom
n 1: microscopic unicellular marine or freshwater colonial alga
having cell walls impregnated with silica

The Collaborative International Dictionary of English v.0.48 (gcide)

Diatom \Di"a*tom\ (d[imac]`[.a]*t[o^]m), n. [Gr. dia`tomos cut
in two. See {Diatomous}.]
1. (Bot.) One of the {Diatomace[ae]}, a family of minute
unicellular Alg[ae] having a siliceous covering of great
delicacy, each individual multiplying by spontaneous
division. By some authors diatoms are called
{Bacillari[ae]}, but this word is not in general use.
[1913 Webster]

2. A particle or atom endowed with the vital principle.
[1913 Webster]

The individual is nothing. He is no more than the
diatom, the bit of protoplasm. --Mrs. E. Lynn
Linton.
[1913 Webster]

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英文字典中文字典相关资料:

Diatom - Wikipedia
A diatom (Neo-Latin diatoma) [a] is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world Living diatoms make up a significant portion of Earth's biomass
What are Diatoms? - Diatoms of North America
Diatoms are algae that live in houses made of glass They are the only organism on the planet with cell walls composed of transparent, opaline silica Diatom cell walls are ornamented by intricate and striking patterns of silica Why should I care?
Diatom Nutrients | Shop Diatom RX Products
At Diatom Nutrients, we research, source, and develop clinically proven organic alternative medicine for improving lives
Diatoms of North America
Classification information, citations, links and species listings for 207 genera completed to date Identification guides, original descriptions, citations, autecological information and more for 1127 species and growing We encourage new contributors to submit taxon pages
Diatomaceous earth - Wikipedia
Diatomaceous earth ( ˌdaɪ ətəˈmeɪʃəs DY-ə-tə-MAY-shəs), also known as diatomite ( daɪˈætəmaɪt dy-AT-ə-myte), celite, or kieselguhr, is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder
Diatom | Description, Characteristics, Reproduction | Britannica
diatom, (class Bacillariophyceae), any member of the algal class Bacillariophyceae (division Chromophyta), with about 16,000 species found in sediments or attached to solid substances in all the waters of Earth
Diatom - Definition, Reproduction and Location | Biology Dictionary
Diatoms (pictured below) are a common type of unicellular phytoplankton that likely originated around the Jurassic period Diatoms can form colonies characterized by particular shapes (e g , stars, fans, and ribbons) and are encapsulated by a unique cell wall composed of silica, termed a frustule
Online Guide Now Available for Diatoms of the United States
Diatoms are algae that reflect the biotic condition of streams, lakes, and estuaries They are important indicator organisms because they are sensitive to natural and human impacts, and monitoring their condition provides information about ecosystem health
Diatoma | Genera - Diatoms of North America
The genus Diatoma possesses a raised central sternum, which may or may not be distinct Transverse costae are characteristically thickened and septae are absent Striae are comprised of uniseriate rows of areolae Each valve has a single rimoportula, positioned near a valve terminus and oriented transapically A ligula is present on the
ANSP Diatoms Home Page
Welcome to the Diatom New Taxon File at the Academy of Natural Sciences, Philadelphia For scientists, taxonomists, systematists, students and diatom enthusiasts

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