(electronics) The point in time when a signal's value becomes low.

Alternative spelling of HIV negative

An auxiliary verb used for negation in certain languages.

(electrical engineering) The use of the higher(positive) voltage level to represent the Boolean value 0 and the lower voltage(negative) level to represent the Boolean value 1.

Not infected by HIV.

Alternative form of gram-negative (Note: The form with capital G is the only form given in the American Heritage Dictionary. "Gram" is actually a proper name.)

(optics) A uniaxial crystal, such as one of calcite, in which the extraordinary wave travels faster than the ordinary wave / A crystal that contains a cavity

A situation where some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output, whether caused by changes in the input or by other disturbances.

(art) The space around and between the subjects of an image.

plural of negative space