knuckle joint

American  

noun

1. a joint forming a knuckle.

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

---

knuckle joint British  

noun

1. any of the joints of the fingers

2. mechanical engineering a hinged joint between two rods, often a ball and socket joint

---

Etymology

Origin of knuckle joint

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 • Apr. 18, 2023

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

From Newsweek • Feb. 15, 2015

By means of a knuckle joint the frozen collar was sidestepped, and the hole, now pinched down to six inches, went on down.

From Time Magazine Archive

A mysterious knuckle joint in the sled's suspension was said to make up for some of the stiffness of the one-piece body.

From Time Magazine Archive

When practising, I play everything very slowly, raising my fingers high and straight from the knuckle joint.

From Piano Mastery Talks with Master Pianists and Teachers by Brower, Harriette