rhamnetin

[Eng. rhamn (us); et connect., and suff. -in.] Chemistry : C11H1005. A yellow, crystalline body, obtained by boiling xanthorhamnin with dilute sulphuric or hydrochloric acid. It is insoluble in alcohol and ether, slightly soluble in water, and very soluble in alkalies. rhăm-nîne, subst. [Mod. Lat. rhamn (us); -ine ( Chem.).] Chem.: C12H12O5+2H2O. A yellow substance, discovered by Fleury in 1840, and extracted from the unripe berries of Rhamnus cathartic us by repeatedly boiling with water, setting the decoctions aside to crystallize, and purifying by recrystallization from boiling alcohol. It forms cauliflower-like crystals, insoluble in cold water and in ether, slightly soluble in boiling water and in alcohol, very soluble in boiling alcohol. It di olves easily in caustic alkalies, forming uncrystallizable, reddish-yellow solutions. rhăm-ni-tēs, subst. [Mod. Lat. rhamnus; Lat. suff. -ites.] Palæobot .: A genus of fo il plants akin to Rhamnus (q. v.). Two known species from the Miocene. One, Rhamnites lanceolatus , is found in the Bovey Tracey beds (Lower Miocene or Oligocene). rhăm-no-ca-thar'-tin, subst. [Modern Latin rhamn (us); o connect., and English cathartine.] [CAT HART IN A.] Chem.: The uncrystallizable principle of buckthorn berries. It is an amorphous, yellowish, brit tle ma , soluble in all proportions in water and alcohol, but insoluble in ether. It has a bitter and very repulsive taste, and, when heated, melts to a yellowish-brown oil, gives off inflammable vapors, and leaves combustible charcoal. Ferric chloride colors it dark green, and, when heated with nitric acid, it yields a large quantity of picric acid. rhăm-nô-tăn-nic, a . [Mod. Latin rhamn (us); o connective, and Eng. tannic.] Derived from or containing rhamnine and tannic acid. IMG:content-0590.png:[blocks in formation] also those of R. infector i us, when unripe, a yellow dye. Mixed with gum-arabic and lime water they have been employed as astringents, purgatives, form Bladder-green. R. purpure a is a purgative, tonics, sedatives, . [CEANOTHUS, COLUBRINA, R. wightii , an astringent and a deobstruent. DISCARIA, GOUANIA, SAGE RETIA.] [AVIGNON-BERRIES.] rhaphiolepis 2. Palæobot.: One species is known, from the Middle Eocene of Northwestern Europe. 3. Pharm.: Rhamni baccæ, Spinæ cervini baccæ, Rhamni cathartic i baccæ = Buckthorn berries. Rhamni cathartic i baccæ succus=the juice of the Buckthorn berries. They are rarely used as a cathartic, but frequently as an officinal syrup. rhămph-, rhăm-pho-, pref. [Gr.rhamphos=a bird's bill, especially that of a bird of prey.) Having a large beak or bill. rhăm phăs-ti-dæ, s. pl. [Mod. Latin rham phast ( os ); Lat. fem. pl. adj. suff.- idœ.] Ornith.: Toucans; a family of Scansorial Picarian Birds, confined to the Neo tropical regions. They are fruit-eaters, and strictly arboreal. Bill very long and wide, vascular within, curved above, compre ed, edges notched; tongue long and feathered. Genera: Rhamphastos, Pteroglo us, Selenidera, And i gena, and Aulacorhamphus. rhăm phăs-tos, *răm-phăs-tos, s. [Gr.rham phos a beak, a bill.] Ornith.: Toucan; the type-genus of Rhamphastidæ (q. v.). Bill smooth, nostrils at base, nearly hidden by projection of keel; tail short, even; toes outer pair larger than inner, claws strong. Wallace puts the species at twelve, ranging from Mexico to South Brazil. rhăm-phích-thys, s. [Pref. ramph-, and Greek ichthys=a fish.] Ichthy.: A genus of Gymnotidæ, from tropical America. No caudal or dorsal fin; teeth absent. Six species, some with a short, others with a tubiform snout. rhăm-pho-, pref. [RHAMPH-.] rhăm-phô-çěph-a-lus, s. [Pref. rhampho-, and Gr. kephale =the head.] Paleont .: A genus of Pleiosauria.