[loo-tee-shee-uh
m] 
| lu·te·ci·um (lōō-tē'shē-əm) n. Variant of lutetium. |
| lu·te·ti·um also lu·te·ci·um (lōō-tē'shē-əm) n. Symbol Lu A silvery-white rare-earth element that is exceptionally difficult to separate from the other rare-earth elements, used in nuclear technology. Atomic number 71; atomic weight 174.97; melting point 1,663°C; boiling point 3,395°C; specific gravity 9.840 (at 25°C); valence 3. See Table at element. [Latin Lutetia, ancient name of Paris, France (where it was discovered) + -ium.] |
lutetium lu·te·ti·um or lu·te·ci·um (l&oomacr;-tē'shē-əm)
n.
Symbol Lu
A rare-earth element, used in nuclear research. Atomic number 71; atomic weight 174.97; melting point 1,663°C; boiling point 3,393°C; specific gravity 9.841 (at 25°C); valence 3.
lutetium (l -tē'shē-əm) Pronunciation Key
Symbol Lu A silvery-white metallic element of the lanthanide series that is used in nuclear technology. Its radioactive isotope is used in determining the age of meteorites. Atomic number 71; atomic weight 174.97; melting point 1,663°C; boiling point 3,395°C; specific gravity 9.840 (at 25°C); valence 3. See Periodic Table. |