Also found in: Thesaurus, Encyclopedia, Wikipedia.
A gyroscope consisting of a rotating wheel in a rigid case.
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.
a modified gyroscope consisting of a rotating wheel pivoted within a rigid case.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.