enetc.) ensingle sheets etc. enEuropean Travel Commission, ETC endirecting (of documents, requests, etc.) enregular print (non-italic, etc.) enpiano [violin etc.] conductor part ensubsequent generation offspring (F3, F4, etc.) ennet supply (of water, gas etc.) enknowledge of aircraft terminology relating to engines, fuselage, control surfaces, undercarriage, lights, vents, etc.