石磨(mo)(mo)(mo)是用于把米、麥(mai)、豆(dou)等糧(liang)食加工(gong)(gong)成(cheng)(cheng)粉、漿(jiang)的一種機械,用人(ren)力或畜力使它轉動(dong),就把米面(mian)(mian)磨(mo)(mo)(mo)成(cheng)(cheng)粉了(le)。它通常由兩(liang)個(ge)圓石做成(cheng)(cheng),磨(mo)(mo)(mo)是平面(mian)(mian)的兩(liang)層(ceng)(ceng)(ceng),兩(liang)層(ceng)(ceng)(ceng)的接合處都有紋(wen)理,糧(liang)食從(cong)上方的孔(kong)進入兩(liang)層(ceng)(ceng)(ceng)中(zhong)間,沿著紋(wen)理向外運移,在滾動(dong)過兩(liang)層(ceng)(ceng)(ceng)面(mian)(mian)時被(bei)磨(mo)(mo)(mo)碎,形(xing)成(cheng)(cheng)粉末(mo)。石磨(mo)(mo)(mo)大(da)(da)大(da)(da)減輕了(le)勞動(dong)強度,提(ti)高了(le)生產效(xiao)率,這是古代糧(liang)食加工(gong)(gong)工(gong)(gong)具(ju)的一大(da)(da)進步,至今有些比較(jiao)落后的農村還在用。