|a scrap or morsel of food left at a meal.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|1.||a joint of a finger, esp that connecting a finger to the hand|
|2.||a joint of veal, pork, etc, consisting of the part of the leg below the knee joint, often used in making stews or stock|
|3.||the cylindrical portion of a hinge through which the pin passes|
|4.||an angle joint between two members of a structure|
|5.||informal near the knuckle approaching indecency|
|6.||(tr) to rub or press with the knuckles|
|7.||(intr) to keep the knuckles on the ground while shooting a marble|
|[C14: related to Middle High German knöchel, Middle Low German knoke bone, Dutch knok]|
|(intr, adverb) to give way under pressure or authority; yield|
knuckle knuck·le (nŭk'əl)
The prominence of the dorsal aspect of a joint of a finger, especially of one of the joints that connect the fingers to the hand.
A rounded protuberance formed by the bones in a joint.
A kink or loop of intestine, as in a hernia.
knuckle under (to (so/sth)) definition
Also, knuckle down. Give in, acknowledge defeat, as in The dean refused to knuckle under to the graduate students' demands, or He was forced to knuckle down before their threats of violence. Presumably this idiom alludes to a kneeling position with hands on the ground, knuckles down. [Mid-1700s]