mastoid process

noun

1. a large, bony prominence on the base of the skull behind the ear, containing air spaces that connect with the middle ear cavity.

mastoid process

/ măs′toid′ /

1. A protruding bony area in the lower part of the skull that is located behind the ear in humans and many other vertebrates and serves as a site of muscle attachment. The mastoid process contains small air-filled cavities called mastoid cells that communicate with the middle ear.

Word History and Origins

Origin of mastoid process¹

First recorded in 1725–35

Example Sentences

(ii) If there be symptoms of inflammation of the mastoid process, or of internal-ear or of intracranial suppuration.

From Project Gutenberg

The object of the operation is to permit of free drainage and to prevent involvement of the mastoid process itself.

From Project Gutenberg

For their successful performance a knowledge of the anatomical relationships of the mastoid process is essential.

From Project Gutenberg

This may be necessary if the anterior wall of the antrum and mastoid process be affected.

From Project Gutenberg

After exposing the antrum in the ordinary way, the tip of the mastoid process is opened freely.

From Project Gutenberg