diatom

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di·a·tom

(dī'ă-tom),
An individual of microscopic unicellular algae, the shells of which comprise a sedimentary infusorial earth.
[G. diatomos, cut in two]
Farlex Partner Medical Dictionary © Farlex 2012

diatom

(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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

diatom

a member of the BACILLARIOPHYCEAE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Two new epizoic Achnanthes species (Bacillariophyta) living on marine turtles from Costa Rica.
Teniendo en cuenta esta escala, las relaveras Lacsacocha, Yanamate, Quiulacocha y Milpo (1.22-2.91 bits.[ind..sup.-1]) presentaron una contaminacion moderada, la baja diversidad de especies se debe a la composicion fitoplanctonica dominada por Bacillariophyta, relacionadas a pH acidos, bajos niveles de conductividad y metales pesados por debajo de los ECAs.
Cyan: Cyanophyta, Chlo: Chlorophyta, Baci: Bacillariophyta, Eugl: Euglenophyta, Cryp: Cryptophyta, Pyrr: Pyrrophyta, Chry: Chrysophyta, Xant: Xanthophyta.
Of all groups identified, Bacillariophyta had the highest median (386 cells/mL per day).
The most common plant species found close to the industrial compounds in Khartoum State are: Calatropis procera and algae biomass which are mixed of several species but mainly of four divisions (Chlorophyta Cyanophyta Euglnophyta and Bacillariophyta).
In Haleji Lake, total 73 species of phytoplankton were recorded with 53.84% of Cynophyta, 33% of Chlorophyta and 13.84% of Bacillariophyta. Cyanophyta are represented by bloom forming species belonging to the genus Microcysts,
The phytoplankton species compositions in Qingdao and Weihai were quite similar, being composed of 50% Bacillariophyta, 29% Pyrrophyta, 5% Chlorophyta, 5% Chrysophyta, 7% Protozoa, and 4% unidentified species.