| rhamnoside | A glycoside of rhamnose. (05 Mar 2000) |
|---|---|
| rhamnoxanthin | <chemistry> A yellow crystalline dyestuff, regarded as a glucoside, extracted from a species (Rhamnus Frangula) of the buckthorn. Synonym: rhamnoxanthin. Source: Websters Dictionary (01 Mar 1998) |
| rhamnulokinase | <enzyme> Specified by structural gene rhab from E coli; catalyses the phosphorylation of rhamnulose to rhamnulose 1-phosphate in the presence of ATP Registry number: EC 2.7.1.5 Synonym: rhamnulose kinase (26 Jun 1999) |
| rhamnus | <botany> A genus of shrubs and small trees; buckthorn. The California Rhamnus Purchianus and the European R. Catharticus are used in medicine. The latter is used for hedges. Origin: NL, from Gr. A kind of prickly shrub; cf. L. Rhamnos. Source: Websters Dictionary (01 Mar 1998) |
| rhamphorhynchus | <paleontology> A genus of pterodactyls in which the elongated tail supported a leathery expansion at the tip. Origin: NL, fr. Gr. A beak + snout. Source: Websters Dictionary (01 Mar 1998) |
| rhamphotheca | Origin: NL, fr. Gr a beak + a case. <ornithology> The horny covering of the bill of birds. Source: Websters Dictionary (01 Mar 1998) |
| rhaphania | A spasmodic disease supposed to be due to poisoning by the seeds of Rhaphanus rhaphanistrum, the wild radish. Synonym: rhaphania. (05 Mar 2000) |
| rhaphe | <botany> The continuation of the seed stalk along the side of an anatropous ovule or seed, forming a ridge or seam. Alternative forms: raphe. Origin: NL, fr. Gr. Seam, fr. To sew. Source: Websters Dictionary (01 Mar 1998) |
| rhaphides | <botany> Minute transparent, often needlle-shaped, crystals found in the tissues of plants. Alternative forms: raphides. Origin: NL, fr. Gr, a needle, F. Raphides. Source: Websters Dictionary (01 Mar 1998) |
| rhaponticine | <chemistry> Chrysophanic acid. Origin: L. Rhaponticum rhubarb. See Rhubarb. Source: Websters Dictionary (01 Mar 1998) |
| rhapsodomancy | Divination by means of verses. Origin: Rhapsody + -mancy. Source: Websters Dictionary (01 Mar 1998) |
| rhapsody | Origin: F. Rhapsodie, L. Rhapsodia, Gr, fr. A rhapsodist; to sew, stith together, unite + a song. See Ode. 1. A recitation or song of a rhapsodist; a portion of an epic poem adapted for recitation, or usually recited, at one time; hence, a division of the Iliad or the Odyssey; called also a book. 2. A disconnected series of sentences or statements composed under excitement, and without dependence or natural connection; rambling composition. "A rhapsody of words." . "A rhapsody of tales." 3. A composition irregular in form, like an improvisation; as, Liszt's "Hungarian Rhapsodies." Source: Websters Dictionary (01 Mar 1998) |
| rhatanhy | The powerfully astringent root of a half-shrubby Peruvian plant (Krameria triandra). It is used in medicine and to colour port wine. Alternative forms: ratany] Savanilla rhatany, the root of Krameria Ixina, a native of new Granada. Origin: Sp. Ratania, ratana, Peruv. Ratana. Source: Websters Dictionary (01 Mar 1998) |
| rhathymia | Rarely used term for outgoing, carefree behaviour. Origin: G. Rhathymeo, to take a holiday, be relaxed (05 Mar 2000) |
| rhe | The absolute unit of fluidity, the reciprocal of the unit of viscosity. Origin: G. Rheos, a stream (05 Mar 2000) |