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A playing marble.
1. An agricultural school or college.
2. A student enrolled at such a school or college.
[ag(ricultural) + -y.]
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.
1. slang US an agricultural student
2. informal a kind of playing marble
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
n. (sometimes cap.)
1. an agriculture college.
2. a student at an agricultural college.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Not a student or graduate of an A&M (Agricultural and Mechanical) school but, rather, an agate marble.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan