From O.Fr. fals, faus, from L. falsus "deceived, erroneous, mistaken," p.p. of fallere "to deceive, disappoint."
Zif, from Tâleši saf "wrong," from Mid.Pers. zêfân, zaspân "wrong, vile;" in classical Pers. dictionaries zif "churlishness; sin."
Fr.: fausse couleur
In imaging technique, assigning color to black and white images to differentiate features or convey information. → true color.
bâmdâd-e zif, ~ doruqin
Fr.: aube trompeuse
An unusually early glow of the horizon near the rising sun during certain times of the year. This early glow does not originate directly from the Sun, but is rather caused by → zodiacal light. It may be mistaken for a sunrise.
Fr.: faux noyau
An especially concentrated region in the → coma of some → comets, representing the dense cloud of inner coma rather than the much smaller true nucleus. Also called apparent nucleus and → pseudo-nucleus.
Fr.: faux vide
A peculiar, hypothetical state of matter which is predicted to exist by current theories of → elementary particles, including the → grand unified theories. Unlike the ordinary vacuum, a false vacuum has a large → energy density and a large → negative pressure. A false vacuum is the driving force behind the rapid expansion in the → inflationary model of the → Universe.