This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The act of making a joint

n. The set of joints so produced

n. The initial grinding of the teeth of a cutting tool, prior to sharpening

n. The act or process of making a joint; also, the joints thus produced.

n. Joints collectively, as in geology.

"The surface ships used by undersea-cable companies to install and repair cables have similar chambers--called jointing rooms--where crews work on the delicate fibers."

joint