Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

excitatory

play
adjective ex·cit·ato·ry \ik-ˈsī-tə-ˌtȯr-ē\

Definition of excitatory

  1. :  exhibiting, resulting from, related to, or producing excitement or excitation <excitatory nerve fibers>




Medical Dictionary

excitatory

play
adjective ex·cit·ato·ry \ik-ˈsīt-ə-ˌtōr-ē, -ˌtȯr-\

Medical Definition of excitatory

  1. 1:  tending to induce excitation (as of a neuron) <excitatory substances> <excitatory and inhibitory pathways from the brain—W. G. Van der Kloot>

  2. 2:  exhibiting, resulting from, related to, or produced by excitement or excitation <an excitatory postsynaptic potential>




Learn More about excitatory

  1. Medical Dictionary: Definition of excitatory


Seen and Heard

What made you want to look up excitatory? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

not forbidden by law

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

two-chairs-on-a-pier-by-the-ocean-in-summer

Which of the following words means “of or relating to summer”?

vernal brumal hiemal estival
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ