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tripod
A tripod is a portable three-legged frame, used as a platform for supporting the weight and maintaining the stability of some other object. A tripod provides stability against downward forces and horizontal forces and movements about horizontal axes. The positioning of the three legs away from the vertical centre allows the tripod better leverage for resisting lateral forces.
==Etymology==
First attested in English in the early 17th century, the word ''tripod'' comes via Latin ''tripodis'' (GEN of ''tripus''), which is the romanization of Greek (''tripous''), "three-footed" (GEN , ''tripodos''), ultimately from (''tri-''), "three times"〔.〕 (from , ''tria'', "three")〔.〕 + (''pous''), "foot".〔.〕 The earliest attested form of the word is the Mycenaean Greek , ''ti-ri-po'', written in Linear B syllabic script.〔''ti-ri-po'' is found on the PY Ta 641 and PY Ta 709 tablets. , ''ti-ri-po-de'' (found on the PY Ta 641 tablet), is the NOM dual form of the word. (【引用サイトリンク】title=The Linear B word ti-ri-po-de ) (【引用サイトリンク】website=DĀMOS: Database of Mycenaean at Oslo )〕
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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