What is the meaning of EM?

EM means Effective margin.

Barry Goldsmith
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APABarry Goldsmith. (2010). em. Retrieved September 21, 2026, from http://smartdefine.org/em/definitions/1152873
ChicagoBarry Goldsmith. 2010. "em" http://smartdefine.org/em/definitions/1152873 (accessed September 21, 2026).
HarvardBarry Goldsmith 2010, em, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/em/definitions/1152873>.
MLABarry Goldsmith. "em" 21 October 2010. Web. 21 September 2026. <http://smartdefine.org/em/definitions/1152873>
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