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active mass

American  

noun

Chemistry.
  1. the effective concentration of a substance.


Etymology

Origin of active mass

First recorded in 1905–10

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Pita has maintained iTV was not an active mass media organisation.

From Reuters Jul. 12, 2023

At week's end active mass resistance appeared to have been suppressed.

From Time Magazine Archive

As you have said, you are using only a minute portion of the active mass of your brain.

From Skylark Three by Wessolowski, Hans Waldemar

The nerve cells are a highly active mass of living material.

From A Practical Physiology by Blaisdell, Albert F.

Guldberg and Waage expressed this in the form “the active mass of a solid substance is constant.”

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" by Various

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