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tung•sten (ˈtʌŋ stən) n. a rare, bright gray, lustrous metallic element having a high melting point, 3410°C: used in electric-lamp filaments.
tung•sten
(ˈtʌŋ stən)
n.
a rare, bright gray, lustrous metallic element having a high melting point, 3410°C: used in electric-lamp filaments.
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Fluorescence (flo͝orĕs`əns), luminescence in which light of a visible color is emitted from a substance under stimulation or excitation by light or other forms of electromagnetic radiation or by certain other means. The light is given off only while the stimulation continues;
Fluorescence
(flo͝orĕs`əns), luminescence
in which light of a visible color is emitted from a substance under stimulation or excitation by light or other forms of electromagnetic radiation or by certain other means. The light is given off only while the stimulation continues;
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watch and ward noun Definition of WATCH AND WARD 1 : continuous unbroken vigilance and guard 2 : service as a watchman or sentinel required from a feudal tenant
watch and ward
noun
Definition of WATCH AND WARD
1
: continuous unbroken vigilance and guard
2
: service as a watchman or sentinel required from a feudal tenant
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race noun \ˈrās\ Definition of RACE 1 chiefly Scottish : the act of running 2 a : a strong or rapid current of water flowing through a narrow channel b : a watercourse used industrially c : the current flowing in such a course
race
noun \ˈrās\
Definition of RACE
1
chiefly Scottish : the act of running
2
a : a strong or rapid current of water flowing through a narrow channel
b : a watercourse used industrially
c : the current flowing in such a course