a salt or ester of glutamic acid.

1875–80; glutam(ic acid) + -ate2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
glutamate (ˈɡluːtəˌmeɪt)
See monosodium glutamate any salt of glutamic acid, esp its sodium salt
[C19: from glutam(ic acid) + -ate1]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

glutamate glu·ta·mate (glōō'tə-māt')

  1. A salt of glutamic acid.

  2. An ester of glutamic acid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Serotonin and glutamate are two of them, and they have corresponding receptors to accept their chemical messages.
Glutamate is a brain chemical that is thought to be involved in depression.
But in the amygdala another neurotransmitter, called glutamate, appears to dominate.
The compound is thought to work by reducing the synaptic release of a neurotransmitter called glutamate.
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