Anagrams of: ENVIRO_

• a piece of armor plate (with eye slits) fixed or hinged to a medieval helmet to protect the face

• a brim that projects to the front to shade the eyes

• a white cheeselike protective material that covers the skin of a fetus

• a style of jazz played by big bands popular in the 1930s; flowing rhythms but less complex than later styles of jazz

• dance to jive music; dance the jive

• of or relating to the null set (a set with no members)

• a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

• a mathematical element that when added to another number yields the same number

• the point on a scale from which positive or negative numerical quantities can be measured

• the sight setting that will cause a projectile to hit the center of the target with no wind blowing

• indicating the absence of any or all units under consideration

• having no measurable or otherwise determinable value

• indicating an initial point or origin

• adjust (an instrument or device) to zero value

• adjust (as by firing under test conditions) the zero of (a gun)

• a locally circumscribed place characterized by some distinctive features

• any of the regions of the surface of the Earth loosely divided according to latitude or longitude

• an area or region distinguished from adjacent parts by a distinctive feature or characteristic

• (anatomy) any encircling or beltlike structure

• regulate housing in; of certain areas of towns

• separate or apportion into sections

• summon into action or bring into existence, often as if by magic

• cite as an authority; resort to

• request earnestly (something from somebody); ask for aid or protection

• join again

• answer back