dog whistle(redirected from Galton's whistle)
Related to Galton's whistle: Dog whistle
1. A whistle used for training or commanding dogs, especially one that emits sound of a frequency too high for most humans to hear.
2. The use of terms that seem innocuous but are intended to convey a hidden and potentially controversial message to a particular audience.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.