צֵלָעtsêlâʻStrong's H6763

a rib (as curved), literally (of the body) or figuratively (of a door, i.e. leaf); hence, a side, literally (of a person) or figuratively (of an object or the sky, i.e. quarter); architecturally, a (especially floor or ceiling) timber or plank (single or collective, i.e. a flooring)

Derivation: or (feminine) צַלְעָה; from צָלַע (H6760)