Defn: Lying outside the visible spectrum at its violet end; — said of rays more refrangible than the extreme violet rays of the spectrum.
ULTRA VIRES Ul`tra vi"res, Etym: [Law Latin, from L. prep. ultra beyond + vires, pl. of. vis strength.]
Defn: Beyond power; transcending authority; — a phrase used frequently in relation to acts or enactments by corporations in excess of their chartered or statutory rights.
ULTRAZODIACAL
Ul`tra*zo*di"a*cal, a. Etym: [Pref. ultra- + zodiacal.] (Astron.)
Defn: Outside the zodiac; being in that part of the heavens that is more than eight degrees from the ecliptic; as, ultrazodiacal planets, that is, those planets which in part of their orbits go beyond the zodiac.
ULTRONEOUS Ul*tro"ne*ous, a. Etym: [L. ultroneus, from ultro to the further side, on his part, of one's own accord. See Ultra-.]
Defn: Spontaneous; voluntary. [Obs.] Jer. Taylor.
— Ul*tro"ne*ous*ly, adv. [Obs.] — Ul*tro"ne*ous*ness, n. [Obs.]
ULULA
Ul"u*la, n. Etym: [L., a screech owl.] (Zoöl.)
Defn: A genus of owls including the great gray owl (Ulula cinerea) of
Arctic America, and other similar species. See Illust. of Owl.
ULULANT
Ul"u*lant, a.