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| one member of the first seven pairs of ribs that are attached in humans to the sternum |
| a muscular and cartilaginous structure lined with mucous membrane at the upper part of the trachea in humans, where the vocal cords are located |
mastoid mas·toid (mās'toid')
n.
The mastoid process. adj.
Of or relating to the mastoid process, antrum, or sinuses.
Shaped like a breast or nipple.