Rib vs Curvicostate - What's the difference?

As a noun rib

is (acronym) rigid inflatable boat — a lightweight inflatable boat with a rigid hull.

(botany|rare) having bent ribs.

(en noun)

Any of a series of long curved bones occurring in 12 pairs in humans and other animals and extending from the spine to or toward the sternum

A part or piece, similar to a rib, and serving to shape or support something

A cut of meat enclosing one or more rib bones

(label) Any of several curved members attached to a ship's keel and extending upward and outward to form the framework of the hull

Any of several transverse pieces that provide an aircraft wing with shape and strength

(label) A long, narrow, usually arched member projecting from the surface of a structure, especially such a member separating the webs of a vault

(label) A raised ridge in knitted material or in cloth

(label) The main, or any of the prominent veins of a leaf

A teasing joke

A single strand of hair.

A stalk of celery.

To shape, support, or provide something with a rib or ribs

To tease or make fun of someone

To enclose, as if with ribs, and protect; to shut in.

* Shakespeare

(label) To leave strips of undisturbed ground between the furrows in ploughing (land).

{{der3, chuck rib , middle rib , ribcage , rib eye , ribgrass , rib-tickler , ribwort , spare rib , ribbed vault , grey rib}}

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(en adjective)

(botany, rare) Having bent ribs.

(Webster 1913)