nMetachloral(Chem) A white, amorphous, insoluble substance regarded as a polymeric variety of chloral.
Century Dictionary and Cyclopedia
nmetachloralA white tasteless solid body, insoluble in water, formed when chloral is kept for some time in contact with strong sulphuric acid. It is a polymerid of chloral. It seems to resemble chloral hydrate in its pharmacodynamic properties.