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 (no͞o-măt′ə-fôr′, nyo͞o-, no͞o′mə-tə-, nyo͞o′-)
1. A gas-filled sac serving as a float in some colonial marine hydrozoans, such as the Portuguese man-of-war.
2. Botany A specialized respiratory root in certain aquatic plants, such as the bald cypress, that grows upward and protrudes above the water or mud into the air.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Botany) a specialized root of certain swamp plants, such as the mangrove, that branches upwards, rising above ground, and undergoes gaseous exchange with the atmosphere
2. (Zoology) a polyp in coelenterates of the order Siphonophora, such as the Portuguese man-of-war, that is specialized as a float
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(nʊˈmæt əˌfɔr, -ˌfoʊr, nyʊ-)

1. a specialized structure developed from the root in certain plants growing in swamps and marshes, serving as a respiratory organ.
2. the air sac of a siphonophore, serving as a float.
pneu•ma•toph•or•ous (ˌnu məˈtɒf ər əs, ˌnyu-) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pneumatophore - an air-filled root (submerged or exposed) that can function as a respiratory organ of a marsh or swamp plant
root - (botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
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According to Coflein, Garrett set up the Garrett Sub-Marine Navigation and Pneumatophore Company Ltd to build the experimental craft.
According to Coflien, Garrett set up the Garrett Sub-Marine Navigation and Pneumatophore Company Ltd to build the experimental craft.
Koedam, "Pneumatophore height and density in relation to microtopography in the grey mangroves Avicennia marina," Belgian Journal of Botany, vol.
They offer wide variety of niches (mangrove barks, leaves, roots (pneumatophore), dead wood, water pool and muddy or sandy sediments) for animals inhabiting mangrove ecosystem.
smallest fish) were within areas of moderate pneumatophore density (Fig.
"With the pneumatophore, which is the gas-bladder, floating at the surface and tentacles several metres long and very thin - but difficult to see - swimmers can see a Man-O-War a few metres away.
Eutrophication has adversely affecting mangrove growth through retardation of pneumatophore growth and retraction from highly reduced areas, and is exacerbated by regional subsidence raising the average tidal water level (Thomas et al.
There are basically two types of pneumatophore. The first, corresponding to the model described, shows a determined longitudinal and radial growth form, like the simple, pencil-shaped roots of Avicennia.
The upper part of the colony consists of buoyant nectophores, underneath the pneumatophore responsible for the colony's vertical orientation and buoyancy.
In the mangrove forest, we manipulated substrate using pneumatophore mimics constructed of 200-ram lengths of 7-mm-diameter maple wood dowel, inserted 100 mm into the sediment.
The 3 ft (1 m) long phylloids (leaves) are distributed along the stipes and have an air bladder, or pneumatophore, that helps them to float.
Each site contained fringing Avicennia marina mangroves, with Sydney rock oysters Saccostrea glomerata growing on the pneumatophores and trunks of the mangroves.