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[2x]

: R RÜ Râ Ré Rô Rö R& R- R. Ra Rb Rc Re Rf Rg Rh Ri Rn Ro Rp Rt Ru Rv Rw Ry

Table of Contents POS
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY

ruthenium

POS

Noun

HYPHEN

ru=the=ni=um

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WORDNET DICTIONARY

Noun ruthenium has 1 sense

ruthenium(n = noun.substance) atomic number 44, ru - a rare polyvalent metallic element of the platinum group; it is found associated with platinum; Array

is a kind of metal, metallic element

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CIDE DICTIONARY

ruthenium, n. [NL. So named from the Ruthenians, a Little Russian people, as coming from Russia, the metal having been found in the Ural mountains.].

A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum. [1913 Webster]

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OXFORD DICTIONARY

ruthenium, n. Chem. a rare hard white metallic transition element, occurring naturally in platinum ores, and used as a chemical catalyst and in certain alloys.

Usage

Symb.: Ru.

Etymology

med.L Ruthenia Russia (from its discovery in ores from the Urals)

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