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[spahy-ruh-jahy-ruh] /ˌspaɪ rəˈdʒaɪ rə/
noun, Botany.
a widely distributed filamentous freshwater green alga of the genus Spirogyra.
Origin of spirogyra
1895-1900; < New Latin, equivalent to spiro- spiro-2 + -gyra, alteration of Greek gŷros circle or gȳrós round Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for spirogyra


any green freshwater multicellular alga of the genus Spirogyra, consisting of minute filaments containing spirally coiled chloroplasts
Word Origin
C20: from New Latin, from spiro-² + Greek guros a circle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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spirogyra in Science
Any of a genus of filamentous freshwater green algae having cylindrically shaped cells with spiral-shaped bands of chloroplasts. Species of Spirogyra reproduce asexually by cell division and fragmentation and sexually by conjugation. They form green scum on ponds, floated by the oxygen produced by photosynthesis.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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