Osma奥斯马OSabbr.操作系统=（Operating System）Oscillatoria amoenan.悦目颤藻oscillatory impulse振荡脉冲Osmunda claytonianan.绒紫萁osmium-base alloy锇基合金osmotic coefficient渗透系数os hypercoracoideum上喙骨Oscillatoria brevisn.镰头颤藻osphotransacetylase磷酸转乙酰酶oscillator klystron振荡速弟oscillating contact振荡触点