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free-living
free love
free lunch
free market
free on board
free on rail
free port
free radical
free-range
free rein
free ride
free safety
free settler
free size
free skating
free soil
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free radical
free rad·i·cal (plural free rad·i·cals)


noun 
Definition:
 
reactive atom or molecule: a highly reactive atom or group of atoms with an unpaired electron
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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