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| a scrap or morsel of food left at a meal. |
| a chattering or flighty, light-headed person. |
mastoid bone n.
See mastoid process.
mastoid process n.
A conical protuberance of the posterior portion of the temporal bone that is situated behind the ear and serves as a site of muscle attachment. Also called mastoid bone.
The part of the first pharyngeal arch in the embryo, developing into the upper jaw in the embryo.
| mastoid process (mās'toid') Pronunciation Key
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. |