rhodizonIc

[Gr. rhodizō =to tinge red; Eng. ( saff ) ro ( n ), and suff. -ic.) (See compound.) rhodizonic-acid, s. Chemistry: A name applied to two distinct compounds, produced under different circumstances from pota ium carb oxide. Alpha-rhodizonic acid, C3H4O6= (C3HO3)}O3, discovered by Heller in 1837, is formed from carboxylic acid by the a umption of water, C10H4O10+2H2O=2C5H4O6. It crystallizes in colorle rhombic prisms, easily soluble in water and alcohol. On exposure to the air the crystals turn brownish-red, heated to 100° they turn black, at a higher temperature they decompose, leaving a carbonaceous residue. The alpha-rhodizonates, produced from the hydro-carboxylates, are all red, and very insoluble. Beta-rhodizonic acid, Geog.: An island off the southwest coast of Asia CtoH6Os. This acid is unknown in the free state, Minor. Rhodes-wood, s . dlewood. Ichth .: The typical genus of the group Rhode in a (q. v.), with three species from Central Europe and China. Rhode us amarus , sometimes found in warm springs, has a silvery-bluish band on the middle of the tail. rhod-ha-lōse, subst. [ Gr.rhodeos =rose-colored; hals salt, and suff. -ose ( Min.).] Min .: The same as BIEBERITE (q. v.). Rhō-di-ạn, a. & 8. [See def.] A. As adj.: Of or pertaining to Rhodes, an island in the Mediterranean. B. As subst.: A native or inhabitant of Rhodes. Rhodian-laws, subst . pl . The earliest system of marine laws, said to have been compiled by the Rhodians after they had, by their commerce and naval victories, obtained the command of the sea, about 900 В. С. rhod-Ic, a. [Eng. rhod(ium); -ic.] Contained in or derived from rhodium (q. v.).