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: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9
[2x]
: T T- T. Ta Tb Tc Td Te Th Ti Tj Tk Tl Tm Tn To Tp Tr Ts Tt Tu Tv Tw Tx Ty Tz
thallate | thallene | thallic | thalline | thallious | thallium | thallogen | thalloid | thallophyta | thallophyte | thallophytic

thallium

 : 
Noun
 : 
thal=li=um

CIDE DICTIONARY

thalliumn. [NL., fr. Gr. young or green shoot or branch, twig. So called from a characteristic bright green line in its spectrum.].
     A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.  [1913 Webster]

OXFORD DICTIONARY

thallium, n. Chem. a rare soft white metallic element, occurring naturally in zinc blende and some iron ores.

Derivative
thallic adj. thallous adj.
Etymology
formed as THALLUS, from the green line in its spectrum

For further exploring for "thallium" in Webster Dictionary Online


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