saddle

noun

1. A seat for a rider, typically made of leather and raised in the front and rear, placed on the back of a horse or other animal, and secured by a strap around the animal's body.
2. A similar implement used to secure goods to animals; a packsaddle.
3. Synonym of harness saddle (“the part of a harness which supports the weight of poles or shafts attaching a vehicle to a horse or other animal”).
4. A cushion used as a seat in a cart or other vehicle.
5. The immovable seat of a bicycle, motorcycle, or similar vehicle.
6. Chiefly preceded by the: horse-riding as an activity or occupation.
7. Synonym of saddle brown (“a medium brown colour, like that of saddle leather”).
8. A low point, in the shape of a saddle, between two hills.
9. A cut of meat that includes both loins and part of the backbone.
10. The part of a denture which holds the artificial teeth.
11. An equipment part, such as a flange, which is hollowed out to fit upon a convex surface and serve as a means of attachment or support.
12. An anticline (“fold with strata sloping downwards on each side”); specifically, a depression located along the axial trend of such a fold.
13. Synonym of saddle reef (“a saddle-shaped bedded mineral (usually gold-bearing quartz) vein occurring along the crest of an anticline or (less common) a syncline (an inverted saddle)”).
14. Synonym of saddle point (“a point in the range of a smooth function, every neighbourhood of which contains points on each side of its tangent plane”).
15. The part of a guitar which supports the strings and, in an acoustic guitar, transfers their vibrations through the bridge to the soundboard.
16. A small object (traditionally made of ebony) at the bottom of a string instrument such as a cello, viola, or violin below the tailpiece on which the tailgut (“cord securing the tailpiece to the instrument”) rests.
17. A block of wood with concave depressions at the top and bottom, usually fastened to one spar and shaped to receive the end of another.
18. The threshold, the raised floorboard in a doorway.
19. The clitellum of an earthworm (family Lumbricidae).
20. The lower part of the back of a domestic fowl, especially a male bird, bearing the saddle feathers or saddle hackles.