11-Letter Words Starting: IO

• the condition of being dissociated into ions (as by heat or radiation or chemical reaction or electrical discharge)

• the process of ionizing; the formation of ions by separating atoms or molecules or radicals or by adding or subtracting electrons from atoms by strong electric fields in a gas

• the outer region of the Earth's atmosphere; contains a high concentration of free electrons

• the substitution or addition of iodine atoms in organic compounds