METR

METR (frans. metre, az yun. matron — chenak, meyor), vohidi darozi dar sistemai metrii chenho va Sistemai vohidhoi baynalkhalqi. Dar sistemai metrii chenho Metr chun ba 10-7 hissai chahoryaki darozii meridiani Parij (1791) qabul shuda bud. Dar sistemai vohidhoi baynalkhalqi (I960) M. ba 1650763,73 darozii mavji afkanishote (dar vakuum) barobar ast, ki ba guzarishi bayni saviyahoi 2ryu va 5ds-u atomi krinton 86 muvofiq meoyad. Ishoratash meshast. 1 m = 0,469 sarchin = = 1,406 arshin = 3,281 fut = 39,71 dyuym = 10 dm = 100 sm = 1000 mm.