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skylark
skylight
skylight filter
skyline
skyr
skyrocket
Skyros
skysail
skyscape
skyscraper
skysurfing
skywalk
skyward
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sky wave
sky wave (plural sky waves)


noun 
Definition:
 
radio wave reflected back by ionosphere: a radio wave that is transmitted around the curved surface of the Earth by being reflected back to Earth by the ionosphere
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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