invertebrate

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invertebrate

 [in-ver´tĕ-brāt]
1. having no vertebral column.
2. any animal that has no vertebral column.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

in·ver·te·brate

(in-ver'tĕ-brāt),
1. Not possessed of a spinal or vertebral column.
2. Any animal that has no spinal column.
Farlex Partner Medical Dictionary © Farlex 2012

invertebrate

(ĭn-vûr′tə-brĭt, -brāt′)
adj.
1. Lacking a backbone or spinal column; not vertebrate.
2. Of or relating to invertebrates: invertebrate zoology.
n.
An animal, such as an insect or mollusk, that lacks a backbone or spinal column.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

in·ver·te·brate

(in-vĕr'tĕ-brăt)
1. Not possessed of a spinal or vertebral column.
2. (in-vĕr'tĕ-brāt) Any animal that has no spinal column.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

invertebrate

any animal that does not possess a backbone.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
When temporary wetlands flood, the previously dry floodplain teems with life as microinvertebrates and insects colonise the turbid waters, there is a pulse of nutrients, algal communities boom, waterbirds congregate in the thousands, fish populations proliferate, and aquatic macrophytes germinate.
Many microscopic biota, including algae and invertebrates, survive drying in temporary waters as resting stages (Wiggins & Mackay 1980) while some microinvertebrates are transported to floodplain wetlands with floodwaters (Jenkins & Boulton 2003).
Do microinvertebrates mostly colonise from their eggs in the dry soils, or do they also arrive with the floodwaters?
In arid zone rivers, post-flood pulses have been recorded for nutrient concentrations, microinvertebrates (>35[micro]m), macroinvertebrates (>250[micro]m), fish, waterbirds, and macrophytes.
Microinvertebrates comprise a significant proportion of the biomass in arid-zone river systems and play a critical role in their food webs (Bunn & Davies 1999).
Asplanchnidae Gastropodidae Lindiidae Microcodidae Synchaetidae Trochosphaeridae and Filinia Vol.6 Guides to the identification of the microinvertebrates of the continental waters of the world.
In Western Australian fresh waters, however, this threshold is higher than that observed elsewhere, particularly among invertebrates and microinvertebrates.
Microinvertebrates associated with Limnoperna fortunei (Dunker, 1957) (BIVALVIA, MYTILIDAE) In Rio de la Plata, Argentina.