1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
ARM (a common Teutonic word; the Indo-European root is ar, to join or fit ; cf . the Lat. armus, shoulder, and the plural word tirma, weapons, Gr. Appfo, joint, and the reduplicated apapioiuir. to join), the human upper limb from the shoulder to the wrist, and the fore limb of an animal. (See ANATOMY : Superficial and A rtistic, and SKELETON : A ppendiculor.) The word is also used of any projecting limb, as of a crane, or balance, of a branch of a tree, and so, in a transferred sense, of the branch of a river or a …
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- Vol. 2, pp. 559-560