| (Few results found for iridious automatically try iridium) |
| Iridious | a. (Chem.) Of or pertaining to iridium; -- applied specifically to compounds in which iridium has a low valence. [ 1913 Webster ] | | iridium | n. [ NL., fr. L. iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See Iris. ] (Chem.) A rare metallic element of atomic number 77, of the same group as platinum, which it much resembles, being silver-white and indifferent to most corrosive agents, but harder, more brittle, and with a higher melting temperature (2410° C, versus platinum 1772° C). With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.22. [ 1913 Webster +PJC ] ☞ Iridium usually occurs as a native alloy with osmium (iridosmine or osmiridium), which may occur alone or with platinum. Iridium, as an alloy with platinum, is used in bushing the vents of heavy ordnance. It is also used for the points of gold pens, and in a finely powdered condition (iridium black), for painting porcelain black. [ 1913 Webster ] |
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| | Iridium | เออรีเดี่ยม, ไอริเดียม [การแพทย์] |
| | | อิริเดียม | (n) iridium, Thai Definition: ธาตุลำดับที่ 77 สัญลักษณ์ Ir เป็นโลหะ ลักษณะเป็นของแข็งสีขาวคล้ายเงิน เนื้อแข็งมาก เป็นธาตุที่หนักที่สุดเท่าที่รู้จักกัน หลอมละลายที่ 2454 ํ ซ. เป็นโลหะที่ทนทานต่อการสึกกร่อนที่สุด ใช้ประโยชน์นำไปผสมกับโลหะอื่นให้เป็นโลหะเจือ, Notes: (อังกฤษ) |
| | | | iridium | (n) a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium, Syn. Ir, atomic number 77 |
| | iridium | n. [ NL., fr. L. iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See Iris. ] (Chem.) A rare metallic element of atomic number 77, of the same group as platinum, which it much resembles, being silver-white and indifferent to most corrosive agents, but harder, more brittle, and with a higher melting temperature (2410° C, versus platinum 1772° C). With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.22. [ 1913 Webster +PJC ] ☞ Iridium usually occurs as a native alloy with osmium (iridosmine or osmiridium), which may occur alone or with platinum. Iridium, as an alloy with platinum, is used in bushing the vents of heavy ordnance. It is also used for the points of gold pens, and in a finely powdered condition (iridium black), for painting porcelain black. [ 1913 Webster ] |
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