— sinuslike , adj.
/suy"neuhs/ , n. , pl. sinuses .
1. a curve; bend.
2. a curving part or recess.
3. Anat.
a. any of various cavities, recesses, or passages, as a hollow in a bone, or a reservoir or channel for venous blood.
b. one of the hollow cavities in the skull connecting with the nasal cavities.
c. an expanded area in a canal or tube.
4. Pathol. a narrow passage leading to an abscess or the like.
5. Bot. a small, rounded depression between two projecting lobes, as of a leaf.
[ 1590-1600; sinus (s. sinu- ) bent or curved surface, curve, fold ]