megohmn.
/ˈmɛɡəʊm/, U.S. /ˈmɛɡˌoʊm/ One million ohms.
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the world > matter > physics > electromagnetic radiation > electricity > resistance > [noun] > unit of resistance > one million
megohm1867
milliohm1867
meg1975
1867 W. H. Preece in London, Edinb., & Dublin Philos. Mag. 4th Ser. 33 397 Instead of distinguishing the two as is now done, by an immense series and rows of figures, or, as is proposed to be done, by calling the one Ohm, and the other Megohm or Milliohm, we should have aw = a B.A. units.., aΩ = a B.A. units × 1,000,000.
1868 J. L. Clark Elem. Treat. Electr. Measurem. 43 One million ohms = 1 megohm.
1902 Encycl. Brit. XXVIII. 4/2 Convenient multiples and subdivisions of the ohm are the microhm and the megohm.
1943 C. L. Boltz Basic Radio vii. 121 At low frequencies the reactance of such a switch is in perhaps millions of megohms.
1987 Radio & Electronics World Feb. 27/3 If..the AVO 8 was replaced by a digital instrument with an impedance of 10 megohms or more the error due to loading of the circuit would be far less.
This entry has been updated (OED Third Edition, June 2001; most recently modified version published online March 2022).
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