arm

¹arm

noun \ˈärm\

Definition of ARM

1

: a human upper limb; especially : the part between the shoulder and the wrist

2

: something like or corresponding to an arm: as a : the forelimb of a vertebrate b : a limb of an invertebrate animal c : a branch or lateral shoot of a plant d : a slender part of a structure, machine, or an instrument projecting from a main part, axis, or fulcrum e : the end of a ship's yard; also : the part of an anchor from the crown to the fluke — see anchor illustration f : any of the usually two parts of a chromosome lateral to the centromere

3

: an inlet of water (as from the sea)

4

: a narrow extension of a larger area, mass, or group

5

: power, might <the long arm of the law>

6

: a support (as on a chair) for the elbow and forearm

7

: sleeve

8

: the ability to throw or pitch a ball well; also : a player having such ability

9

: a functional division of a group, organization, institution, or activity <the logistical arm of the air force>

— arm·less \ˈärm-ləs\ adjective

— arm·like \-ˌlīk\ adjective

— arm in arm

: with arms linked together <walked down the street arm in arm>

Origin of ARM

Middle English, from Old English earm; akin to Latin armus shoulder, Sanskrit īrma arm

First Known Use: before 12th century

Other Anatomy Terms

bilateral symmetry, carotid, cartilage, dorsal, entrails, prehensile, renal, solar plexus, supine, thoracic, ventral

Rhymes with ARM

barm, charm, farm, harm, smarm