15-Letter Words Containing: A,T,H,E,D,R,A

• equipment that enables a sophisticated separation, e.g. gas chromatographic or liquid chromatographic separation.

• of or concerned with thermodynamics

• the position of headmaster

• A heterocyclic ether having a five-membered ring with four carbon atoms and one oxygen; it is a colourless liquid with an ether-like smell, and is used as a polar solvent.

• Capable of being chemically broken down as the result of a photochemical reaction

• a long thin board with one edge thicker than the other; used as siding by lapping one board over the board below

• telegraphy that uses transmission by radio rather than by wire

• the use of radio to send telegraphic messages (usually by Morse code)