Defn: One who advocates extreme measures; an ultraist; an extremist; a radical. Brougham.
ULTRAGASEOUS
Ul`tra*gas"e*ous, a. [Pref. ultra + gaseous.] (Physics)
Defn: Having the properties exhibited by gases under very low pressures (one millionth of an atmosphere or less). Matter under this condition, which has been termed the fourth state of matter, is sometimes called radiant matter.
ULTRAGE
Ul"trage, n.
Defn: Outrage. [Obs.]
ULTRAISM
Ul"tra*ism, n. Etym: [Cf. F. ultraïsme. See Ultra-.]
Defn: The principles of those who advocate extreme measures, as radical reform, and the like. Dr. H. More.
ULTRAIST
Ul"tra*ist, n.
Defn: One who pushes a principle or measure to extremes; an extremist; a radical; an ultra.
ULTRAMARINE
Ul`tra*ma*rine", a. Etym: [Pref. ultra- + marine.]