1. (noun) any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

• rib

1. (noun) a riblike part of a plant or animal (such as a middle rib of a leaf or a thickened vein of an insect wing)

• anatomical structure
• bodily structure
• body structure
• complex body part
• structure

2. (noun) any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

• bone
• os

1. (noun) any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

• craniate
• vertebrate

1. (noun) any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

• true rib

1. (noun) a riblike part of a plant or animal (such as a middle rib of a leaf or a thickened vein of an insect wing)

• costal

2. (noun) any of the 12 pairs of curved arches of bone extending from the spine to or toward the sternum in humans (and similar bones in most vertebrates)

• costal