9-Letter Words Containing: I,R,I,O

• a substance that oxidizes another substance

• the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen

• the property of being close together

• the region close around a person or thing

• a Gestalt principle of organization holding that (other things being equal) objects or events that are near to one another (in space or time) are perceived as belonging together as a unit

• a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon

• To reduce in size, often to micrometer scale.