invertebrate

invertebrate definition - medical

in·ver·te·brate (ĭn-vûrˈtə-brĭt, -brātˌ)

adjective
  1. Lacking a backbone or spinal column; not vertebrate.
  2. Of or relating to invertebrates.
noun
An animal, such as an insect or a mollusk, that lacks a backbone or spinal column.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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