seamark
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sea·mark
(sē′märk′)n.
1. A landmark visible from the sea, used as a guide in navigation.
2. A buoy or channel marker.
3. A transient natural feature, such as a clump of floating vegetation or a flock of birds in flight, that gives a rough indication of the proximity or direction of land, used as a navigational guide in some traditional seafaring cultures.
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.
seamark
(ˈsiːˌmɑːk)n
(Nautical Terms) nautical an aid to navigation, such as a conspicuous object on a shore used as a guide
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
sea•mark
(ˈsiˌmɑrk)n.
a conspicuous object on land, visible from the sea, serving to guide or warn mariners, as a beacon.
[1475–85]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.