the world > animals > fish > parts of fish > [noun] > bones (various types of) > fossil (3)
A smooth, roughly cylindrical fossil a few inches long and tapering to a point; a belemnite (belemnite, n. 1). Now historical and rare.
A fossil common in rocks of the Secondary formation; a straight, smooth, cylindrical object, a few inches long, convexly tapering to a sharp…
A fossil spine of a fish or fish-like vertebrate.