intervertebral disc

World English Dictionary
intervertebral disc (ˌɪntəˈvɜːtəbrəl) [Click for IPA pronunciation guide]
 
n
any of the cartilaginous discs between individual vertebrae, acting as shock absorbers

Collins English Dictionary - Complete & Unabridged 10th Edition
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WordNet
intervertebral disc

noun
a fibrocartilaginous disc serving as a cushion between all of the vertebrae of the spinal column (except between the first two) 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
Intervertebral disc is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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