chromium – מילון אנגלי-אנגלי
chromium
n.
(Cr) chrome a metallic element (Chemistry)
Chromium
Chromium is a
chemical element with symbol
Cr and
atomic number 24. It is the first element in
Group 6. It is a steely-grey,
lustrous,
hard and brittle
metal which takes a high polish, resists tarnishing, and has a high melting point. The name of the element is derived from the
Greek word χρῶμα,
chrōma, meaning
color, because many of its compounds are intensely colored.
chromium
Noun
1. a hard brittle blue-white multivalent metallic element; resistant to corrosion and tarnishing
(synonym) Cr, atomic number 24
(hypernym) metallic element, metal
(hyponym) chrome
(substance-holonym) chromite
chromium (het)
n.
chromium, chrome (metallic element)
Chromium
(n.)
A comparatively rare element occurring most abundantly in the mineral chromite. Atomic weight 52.5. Symbol Cr. When isolated it is a hard, brittle, grayish white metal, fusible with difficulty. Its chief commercial importance is for its compounds, as potassium chromate, lead chromate, etc., which are brilliantly colored and are used dyeing and calico printing. Called also chrome.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
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