Promontory

Part of speech: noun (n.)

1. A high point of land or rock projecting into the sea beyond the line of coast; a headland; a high cape. Like one that stands upon a promontory. Shak.

2. A projecting part. Especially: (a) The projecting angle of the ventral side of the sacrum where it joins the last lumbar vertebra.

3. A prominence on the inner wall of the tympanum of the ear.