hinge joint between the forearm and upper arm and the corresponding joint in the forelimb of a quadruped | any projection that is thought to resemble a human arm |
the arm from the elbow to the fingertips | the graduated arc that is attached to an instrument for measuring angles |
| either of the two halves of a bow from handle to tip |
| one of the jointed appendages of an animal used for locomotion or grasping: arm, leg, wing, flipper |
| (astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet |
| any of the main branches arising from the trunk or a bough of a tree |