Dictionary.com
definitions

mks system

abbr.
  1. meter-kilogram-second system
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
mks system in Science

mks system

[ĕm′kā′ĕs′]
  1. See meter-kilogram-second system.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.