a silvery-white metallic element of the platinum family, forming salts that give rose-colored solutions: used to electroplate microscopes and instrument parts to prevent corrosion. Symbol: Rh; atomic weight: 102.905; atomic number: 45; specific gravity: 12.5 at 20°C.
a hard corrosion-resistant silvery-white element of the platinum metal group, occurring free with other platinum metals in alluvial deposits and in nickel ores. It is used as an alloying agent to harden platinum and palladium. Symbol: Rh; atomic no: 45; atomic wt: 102.90550; valency: 2–6; relative density: 12.41; melting pt: 1963±3°C; boiling pt: 3697±100°C
rhodium rho·di·um (rō’dē-əm)
A hard durable metallic element. Atomic number 45; atomic weight 102.905; melting point 1,964°C; boiling point 3,700°C; specific gravity 12.41; valence 2, 3, 4, 5, 6.
A rare, silvery-white metallic element that is hard, durable, and resistant to acids. It is used as a permanent plating for jewelry and is added to platinum to make high-temperature alloys. Atomic number 45; atomic weight 102.905; melting point 1,966°C; boiling point 3,727°C; specific gravity 12.41; valence 2, 3, 4, 5, 6. See Periodic Table.
1. a combining form meaning “rose,” used in the formation of compound words: rhodolite. combining form 1. rose or rose-coloured: rhododendron, rhodolite rhodo- or rhod- pref. Rose; rosy; red: rhodopsin.
[roh-duh-kroh-sahyt] /ˌroʊ dəˈkroʊ saɪt/ noun 1. a mineral, manganese carbonate, MnCO 3 , commonly containing some iron and calcium, and usually rose-red in color: a minor ore of manganese; manganese spar. rhodochrosite /ˌrəʊdəʊˈkrəʊsaɪt/ noun 1. a pink, red, grey, or brown mineral that consists of manganese carbonate in hexagonal crystalline form and occurs in ore […]
[roh-duh-den-druh n] /ˌroʊ dəˈdɛn drən/ noun 1. any evergreen or deciduous shrub or tree belonging to the genus Rhododendron, of the heath family, having rounded clusters of showy, pink, purple, or white flowers and oval or oblong leaves. rhododendron /ˌrəʊdəˈdɛndrən/ noun 1. any ericaceous shrub of the genus Rhododendron, native to S Asia but widely […]
- Rhododendron bug
noun 1. See lace bug