diatom

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Related to Bacillariophyta: Bacillariophyceae

di·a·tom

 (dī′ə-tŏm′)
n.
Any of various microscopic one-celled or colonial heterokonts of the class Bacillariophyceae that are photosynthetic, have a silica cell wall made up of two interlocking parts, and form an important component of phytoplankton.

[New Latin diatoma, from Greek diatomos, cut in half, from diatemnein, to cut in half : dia-, dia- + temnein, to cut; see tem- in Indo-European roots.]

diatom

(ˈdaɪətəm; -ˌtɒm)
n
(Microbiology) any microscopic unicellular alga of the phylum Bacillariophyta, occurring in marine or fresh water singly or in colonies, each cell having a cell wall made of two halves and impregnated with silica. See also diatomite
[C19: from New Latin Diatoma (genus name), from Greek diatomos cut in two, from diatemnein to cut through, from dia- + temnein to cut]

di•a•tom

(ˈdaɪ ə təm, -ˌtɒm)

n.
any of numerous mostly marine algae of the class Bacillariophyceae (phylum Chrysophyta), each one-celled alga being enclosed in an intricately patterned double shell of silica, one shell fitting over the other like a box lid.
[1835–45; < New Latin Diatoma orig. a genus name, feminine n. based on Greek diátomos cut in two. See dia-, -tome]

di·a·tom

(dī′ə-tŏm′)
Any of various microscopic one-celled algae that live in water, have hard shells composed mostly of silica, and often live in colonies. Diatom shells are made of two symmetrical parts called valves.

diatomaceous (dī′ə-tə-mā′shəs) adjective
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.diatom - microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silicadiatom - microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
phytoplankton - photosynthetic or plant constituent of plankton; mainly unicellular algae
alga, algae - primitive chlorophyll-containing mainly aquatic eukaryotic organisms lacking true stems and roots and leaves
Bacillariophyceae, class Bacillariophyceae, class Diatomophyceae, Diatomophyceae - marine and freshwater eukaryotic algae: diatoms
Translations
References in periodicals archive ?
2006) Chlorophyll a 3 Plantae, Algae Pheophytin b 2 Chl b derivative (Plantae, Chlorophya, Euglenophyta) Pheophytin a 1 Chl a derivative (Plantae, Algae) [beta]-Carotene 1 Plantae, Algae Lutein 1 Chlorophya, Euglenophyta, Plantae Alloxanthin 1 Cryptophyta Diatoxanthin 2 Bacillariophyta, Dinophyta, Chrysophyta Zeaxanthin 1 Cyanobacteria (Chlorophya) Echinenone 1 Cyanobacteria Myxoxanthophyll 2 Colonial Cyanobacteria
Groups that are exclusively unicellular (such as Bacillariophyta, Cryptophyta and Dinophyta).
While it is unclear how efficient copepods are in handling filamentous cyanobacteria in comparison to a filamentous Chlorophyta or Bacillariophyta, Burns & Xu (1990) found calanoid copepods significantly reduced both density and trichome length of filamentous cyanobacteria.