Anagrams of: ECTRON_

• A groove at the ends of the staves of a barrel into which the edge of the head is fitted.

• A cooper's tool for making these grooves.

• the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum

• the tissue forming the outer layer of an organ or structure in plant or animal

• the tissue that surrounds the lens nucleus

• Cousin (usually as a term of address)

• Because

• 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

• expect, believe, or suppose

• judge to be probable

• deem to be

• make a mathematical calculation or computation

• have faith or confidence in

• take account of

• any vehicle self-propelled by a rocket engine

• a jet engine containing its own propellant and driven by reaction propulsion

• erect European annual often grown as a salad crop to be harvested when young and tender

• propels bright light high in the sky, or used to propel a lifesaving line or harpoon

• sends a firework display high into the sky

• shoot up abruptly, like a rocket

• propel with a rocket