Definition of "isometric" [i•so•met•ric]

• Of or exhibiting equality in dimensions or measurements. (adjective)
• Of or being a crystal system of three equal axes lying at right angles to each other. (adjective)
• Physiology Of or involving muscular contraction against resistance in which the length of the muscle remains the same. (adjective)
• A line connecting isometric points. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This will mean that they will need to take blood pressure lowering medicines and may need to avoid certain isometric activities, like football, weight-training, and wrestling."
• "These are called isometric exercises, and they really work if you do them."
• "Angelo Siciliano immigrated to New York from Italy as a child, and after getting pounded on by Brooklyn bullies for a few years, he came up with the idea of muscle-against-muscle fitness training, now known as isometric exercise."