castoreum
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cas·tor·e·um
(kăs-tôr′ē-əm)n.
See castor1.
[Latin castor, beaver; see castor1 + -eum, neuter of -eus, denominal adjective suffix.]
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.
castoreum
(kɑːˈstɔːrɪəm)n
the oil secreted from the beaver which is used as bait by trappers
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
cas•tor1
(ˈkæs tər, ˈkɑ stər)n.
1. Also, castoreum. a pungent, brownish, oily substance secreted by glands in the groin of the beaver, used in medicine and perfumery.
2. a hat made of beaver or rabbit fur.
3. a beaver.
[1350–1400; Middle English < Latin < Greek kástōr beaver]
cas•tor2
(ˈkæs tər, ˈkɑ stər)n.
Cas•tor
(ˈkæs tər, ˈkɑ stər)n.
a star of the second magnitude in the constellation Gemini.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.