- a curve; bend.
- a curving part or recess.
- Anatomy.
- any of various cavities, recesses, or passages, as a hollow in a bone, or a reservoir or channel for venous blood.
- one of the hollow cavities in the skull connecting with the nasal cavities.
- an expanded area in a canal or tube.
- a narrow passage leading to an abscess or the like.
- a small, rounded depression between two projecting lobes, as of a leaf.
- anatomy
- any bodily cavity or hollow space
- a large channel for venous blood, esp between the brain and the skull
- any of the air cavities in the cranial bones
- a passage leading to a cavity containing pus
- a small rounded notch between two lobes of a leaf, petal, etc
- an irregularly shaped cavity
