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{%type%} Definitions

WordNet 3.0Copyright Princeton University
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n. - The two innermost layers of the membranes that envelop the brain and spinal cord

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Usage examples (1)
  • Cerebral amyloid angiopathy (CAA) refers to the deposition of b - amyloid in the media and adventitia of small - and mid-sized arteries (and less frequently, veins) of the...
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The Open Dictionary of English is a collaborative project, based on Open Source materials, LearnThat resources, and partner APIs.
We give special thanks to our LearnThat volunteers, as well as Princeton University and Wiktionary for their Open Source word data. We're also grateful for the support given by Google, Wordnik.com, Dictionary.com, Stands4.com and YouTube, OEDILF.com, Kylescholz.com, Best-Practice.com, Forvo.com, as well as the generous Creative Commons community.