1. Anyone who does not side with any party in a war or dispute or a country that is neutral and does not get involved in a war between other countries.

In other words, not supporting or favoring either side in a war, a dispute, or a contest.

2. Neither moral nor immoral; neither good nor evil or neither right nor wrong.
3. Of no distinctive quality or characteristics or type; that is, possessing no distinctive quality or revealing no attitude or feeling about a person, situation, or thing.
4. Having no net electric charge; not electrified; or a neutral wire that has a zero electric charge or potential.
5. Not strongly colored; that is, not strongly or strikingly colored and so relatively inconspicuous and able to blend easily with other colors.
6. Having only a limited ability to react chemically; not active.

A neutral chemical which is neither an acid nor a base or neither acidic nor alkaline.

7. A reference to a gear or being in a position in which no power is transmitted from a engine to the moving parts; a gear with no motion transmitted.

A reference to anything; such as, toys and other products, as well as, activities and services which can accommodate the needs of either gender, male or female.

An atmospheric environment which neither oxidizes nor reduces materials that are contained within it.

An atom in which the number of electrons that surround the nucleus is the same as the number of protons in the nucleus, resulting in no electric charge.

1. In engineering, the line or plane through the section of a beam or plate which does not suffer extension or compression when the beam or plate bends.
2. A line or plane, in a beam under transverse pressure, at which the fibers in the structure are neither stretched nor compressed, or where the longitudinal stress is zero.

1. A conductor of a polyphase circuit or of a single-phase, three-wire circuit which is intended to have a potential such that the potential differences between it and each of the other conductors are approximately equal in magnitude and are also equally spaced in phase.
2. In electricity, in a polyphase system, a conductor which does not carry a current unless the system becomes unbalanced.

In particle physics, a weak interaction in which no electric charge is exchanged between the colliding particles.

In mechanics, the kind of equilibrium of a body which is so placed that when moved slighty it neither tends to return to its former position nor to depart more widely from it; such as, a perfect sphere or cylinder on a horizontal plane.

In geography, an estuary (the wide part of a river where it nears the sea mixed with fresh and salt water) where freshwater inflow balances outflow and evaporation; and so, it maintains a nearly constant level of salinity (salt).

1. An optical filter that reduces or diminishes the intensity of transmitted light without significanly changing its color.

It is used on a camera to decrease the amount of light entering a camera when the lens cannot be stopped down sufficiently for use with a given film.

2. A light-absorbing filter whose absorption spectrum is moderately flat.

Depending on the type, the absorption curve is flat primarily in the visible spectral range, or it may extend to varying degrees beyond the visible range.

For video microscopy, this is an important procedure since the absorbance may or may not extend into the near-infrared region where the sensitivity of many video image pickup devices is very high.