knuckle joint

noun

1. a joint forming a knuckle.
2. Machinery. a joint between two parts allowing movement in one plane only.

knuckle joint

noun

1. any of the joints of the fingers
2. mechanical engineering a hinged joint between two rods, often a ball and socket joint

Word History and Origins

Origin of knuckle joint¹

First recorded in 1860–65

Example Sentences

She was operated on the next day and doctors cut open her finger to clean and remove the infection around the knuckle joint.

From BBC

The covered parts of my hands are the ones really impacting the machine, not the fingertips greased up with street grime or the first knuckle joints torn up from sharp strings.

From Salon

And indeed, the collapse of the “mathematical” bubbles in the knuckle joint generated sound waves that look just like the ones created in real life, the team reports today in Scientific Reports.

From Science Magazine

The volunteer inserted the fingers one at a time into a tube connected to a cable that was slowly pulled back until the knuckle joint cracked.

From US News

I went to the doctor and found I had a linear fracture in the knuckle joint.

From Newsweek