-ly Definition
(astronomy) Alternative spelling of ly. ; light-year.
Origin of -ly
-  Middle English -li from Old English -līce (influenced by Old Norse -liga) from -līc adj. suff. līk- in Indo-European roots From American Heritage Dictionary of the English Language, 5th Edition 
-  Middle English -li from Old English -līc (influenced by Old Norse -ligr) līk- in Indo-European roots From American Heritage Dictionary of the English Language, 5th Edition 
-  ME < OE -lic < Gmc *lika-, body > like From Webster's New World College Dictionary, 5th Edition 
- ME < OE -lice < -lic - From Webster's New World College Dictionary, 5th Edition 





