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1. (of a class, course, etc.) suitable for learners with some degree of skill or competence
2. Physics (of a neutron) having an energy between 100 and 100 000 electronvolts
3. Geology (of such igneous rocks as syenite) containing between 55 and 66 per cent silica
4. a substance formed during one of the stages of a chemical process before the desired product is obtained
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
A precursor to a desired product; ethylene is an intermediate for polyethylene, and ethane is an intermediate for ethylene.
That print which is used as a master for further reproduction.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.