| the middle portion of the ear, consisting of the tympanic membrane and an air-filled chamber lined with mucous membrane, that contains the malleus, incus, and stapes. |
| the part of the trunk between the neck and the abdomen, enclosed by the ribs, sternum, and vertebrae, which contains the heart and lungs; the chest |
| scalene (skā'lēn') Pronunciation Key
Having three unequal sides, as a triangle that is neither equilateral nor isosceles. |