(topology, idiomatic) A space obtained from another by identification of points that are equivalent to one another in some equivalence relation.

plural of factor space

(slang, Britain) Sod's law or Murphy's law: "Anything that can go wrong will go wrong."

plural of power factor

plural of kata factor

plural of yuck factor

A conversion factor, constant for a given kata thermometer, used to convert the measured time for a standardised drop in temperature into the environmental cooling rate.

plural of ick factor

(informal) Synonym of yuck factor

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.