[ろっかクロム, rokka kuromu] (n) hexavalent chromium[Add to Longdo]
Result from Foreign Dictionaries (2 entries found)
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Chromium \Chro"mi*um\, n. [NL., fr. Gr. ? color.] (Chem.)
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}.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
chromium
n 1: a hard brittle multivalent metallic element; resistant to
corrosion and tarnishing [syn: {chromium}, {Cr}, {atomic
number 24}]
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เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
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