from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Energy derived from any source other than fossil fuels
- n. Energy derived from any renewable source; i.e other than fossil fuels or nuclear fission
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. energy derived from sources that do not use up natural resources or harm the environment
Sorry, no etymologies found.