me·​dul·​la | \ mə-ˈdə-lə How to pronounce medulla (audio) \
plural medullas or medullae\ mə-​ˈdə-​(ˌ)lē How to pronounce medullae (audio) , -​ˌlī \

Definition of medulla

1 plural medullae

2a : the inner or deep part of an animal or plant structure the adrenal medulla

Examples of medulla in a Sentence

Recent Examples on the Web

In fact, the vomiting in motion sickness is induced by the same area of the brain — the chemoreceptor trigger zone in the medulla — that causes vomiting in response to poisons. Quanta Magazine, "Solution: ‘Triangulation and Motion Sickness’," 30 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'medulla.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of medulla

15th century, in the meaning defined at sense 1a

History and Etymology for medulla

Middle English, from Latin

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Last Updated

28 Jun 2019

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The first known use of medulla was in the 15th century

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More Definitions for medulla


me·​dul·​la | \ mə-ˈdəl-ə How to pronounce medulla (audio) , -ˈdu̇l- How to pronounce medulla (audio) \
plural medullas or medullae\ -​(ˌ)ē How to pronounce medullae (audio) , -​ˌī How to pronounce medullae (audio) \

Medical Definition of medulla

1  plural medullae

2a : the inner or deep part of an organ or structure the adrenal medulla

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