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Palm (unit)
The palm may be either one of two obsolete non-SI units of measurement of length.
In English usage the palm, or small palm, also called handbreadth or handsbreadth, was originally based on the breadth of a human hand without the thumb, and has origins in ancient Egypt. It is distinct from the hand, the breadth of the hand with the thumb, and from the fist, the height of a clenched fist.〔 It is usually taken to be equal to four digits or fingers, or to three inches, which, following the adoption of the international inch in 1959, equals exactly 7.62 centimetres. It is today used only in the field of biblical exegesis, where opinions may vary as to its precise historic length.
In other areas, such as parts of continental Europe, the palm ((フランス語:palme), (イタリア語:palmo)) related to the length of the hand, and derived from the Roman great palm, the (ラテン語:palmus major).
==History==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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