(science fiction) A hypothetical figure describing a speed of one light-year per hour.

A measure of the quality of an electric circuit; the ratio of the reactance to the resistance.

(Britain) A trader in grains.

(engineering) The ratio of the maximum stress or load which something can withstand to the stress or load which it was designed to withstand under normal operation.

(biochemistry) Any of various substances that cause apoptosis in cells

The lure of another home, country, region, organization, or religion.

(physics) The ratio of the RMS value to the absolute mean of a sinusoidal wave (especially to that of an alternating current)

An antigen of the Rhesus system; understood unless otherwise specified to refer to Rhesus factor D (RhD), which appears on the surface of the red blood cells of most (85%) humans. An incompatibility between the Rh-blood types of a mother and her baby may cause serious disease for the baby.

(idiomatic) An unknown or hard-to-define influence; a factor with unknown or unforeseeable consequences. / (idiomatic) A special talent, ability or quality or its indefinable cause.

(economics) A resource used to produce goods and services, such as labor, land, or capital.