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 (pē′lē-ən, -ôn′), Mount
A peak, 1,624 m (5,328 ft) high, of northeast Greece in eastern Thessaly. According to Greek legend, it was the home of the centaurs, especially Chiron.
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.


(Placename) a mountain in NE Greece, in E Thessaly. In Greek mythology it was the home of the centaurs. Height: 1548 m (5079 ft). Modern Greek name: Pílion
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈpi li ən)
Mount, a mountain near the E coast of Greece, in Thessaly. 5252 ft. (1600 m).
pile (or heap) Pelion on Ossa,
a. to make matters worse; aggravate or compound a situation.
b. to engage in vain or futile efforts.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Today's versions of Office applications are a sight more elegant than their predecessors and benefit from more stable operating systems than Microsoft once offered but, having added bell upon whistle and heaped Pelion on Ossa in features and workflow aids, it's difficult to see how Microsoft can change the desktop again.