a. Of or relating to: perspiratory.
b. Tending to: amendatory.
2. One that is connected with: reformatory.
[From Latin -ātōrius and -ātōrium, both from -ātor, -ator.]
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.
suffix forming adjectives
of, relating to, characterized by, or serving to: circulatory; exploratory; migratory; explanatory.
[from Latin -ātōrius; see -ate1, -ory2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a combination of -ate1 and -ory1 or -ory2, used infrequently as an independent suffix with the same senses as -ory1 and -ory2: affirmatory; observatory.
[< Latin -ātōrius]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.