form rib

The lower part is spiny and shows a tendency to form ribs.

The sepals form ribs around the hypanthium, giving it a turbine-like appearance.

References to RIB entries are usually written in the simple form RIB 1726.

Carved gold or white cupids perch on high, and stucco filigree and foliage form ribs on the ceiling to the center rosette with its dazzling crystal chandelier.

Even ceilings refuse to be predictable: Hyperfiber forms ribs or fat arches or interwoven domes, and, depending on the grade, they are as bright as mirrors or gray as cold smoke.

The imperforate shell is subulate, many-whorled, polished, and porcellanous Its spire is usually curved or twisted to one side, bearing on one side only, a series of varices forming ribs internally and marking the position of successive mouths.