rhizo-
(ˈraɪzəʊ, raɪˈzɒ)
combining f. Gr. ῥίζα root, used in the formation of many scientific (chiefly botanical) terms: ˈrhizocarp [Gr. καρπός fruit], a plant of the group Rhizocarpeæ (= Marsileaceæ). rhizoˈcarpean a., belonging to the Rhizocarpeæ. rhizoˈcarpic, -ˈcarpous adjs., having a perennial root but perishing stems. ‖ rhizoˈcephala n. pl. [Gr. κεϕαλή head], an order of parasitic hermaphrodite crustaceans closely related to the cirripedes; also sing. ‖ rhizoˈcephalon, a crustacean of this order; hence rhizoˈcephalous a., belonging to the rhizocephala. ˈrhizodont [Gr. ὀδοντ-, ὀδούς tooth] a., having teeth with branching fangs anchylosing with the jaw, as a crocodile; n., a rhizodont reptile. rhizoˈdontropy [Gr. ὀδοντ-, ὀδούς tooth, τροπή turning], ‘pivoting an artificial crown on the root of a tooth’ (Syd. Soc. Lex. 1897). rhizoˈdontrypy [Gr. τρυπᾶν to bore], ‘perforation of the root of a tooth for the discharge of fluid’ (Dunglison, 1876). ˈrhizogen, (a) a plant parasitic on the roots of another plant; spec. one of the Rhizantheæ, Lindley's group of plants of fungoid habit parasitic on rootstocks; (b) a part from which a root or roots grow; rhizogeˈnetic, -ˈgenic adjs., root-producing. ‖ rhizoˈmania, an abnormal development of roots (Treas. Bot.). ˈrhizomorph, ‖ rhizoˈmorpha, a mycelial growth, such as occurs in various fungi, preying on the roots of higher plants. rhizoˈmorphoid, -ˈmorphous adjs., root-like; resembling a rhizomorph. rhiˈzophagous a., feeding on roots. ‖ rhiˈzostoma [Gr. στόµα mouth], a genus of discomedusan hydrozoans having root-like oval arms; an animal of this genus (also ˈrhizostome); hence rhizoˈstomatous, rhiˈzostomous adjs. ‖ rhizoˈtaxis, ˈrhizotaxy, arrangement or disposition of roots. rhiˈzotomist [Gr. ῥιζοτοµός; cf. rhizotome, name of Gargantua's page-apothecary in Rabelais i. xxiii], a collector of roots for medicinal purposes. rhiˈzotomy Surg., section of a spinal nerve root.
| 1875 Bennett & Dyer tr. Sachs' Bot. 391 The Branching of *Rhizocarps is similar to that of Ferns. 1888 J. W. Dawson Geol. Hist. Plants 48 The curious aquatic plants known as Rhizocarps. [Note. Or, as they have recently been named by some botanists, ‘Heterosporous Filices’.] |
| Ibid. 41 The shallow waters filled with aquatic or amphibious *Rhizocarpean plants. |
| 1858 Mayne Expos. Lex., Rhizocarpicus,..*rhizocarpic. |
| 1832 Lindley Introd. Bot. 402 *Rhizocarpous, or those whose root endures many years, but whose stems perish annually; as herbaceous plants. |
| 1865 Darwin in Life & Lett. (1887) III. 38 Until reading your book I knew nothing of the *Rhizocephala. |
| 1869 W. S. Dallas tr. F. Müller's Facts for Darwin 139 The Cirripede had become a *Rhizocephalon. |
| 1894 W. Bateson Mat. Study of Variation i. ii. 95 Males..inhabited by the *Rhizocephalous parasite Sæculina. |
| 1879 Rossiter Dict. Sci. Terms, *Rhizodont. Teeth with branching fangs, which anchylose with the jaw. 1900 Nature 20 Sept. 505/2 The Rhizodont genera Tristichopterus and Eusthenopteron. Ibid. 506/1 We are..justified in considering the Holoplychians..a newer type than the Rhizodonts. |
| 1876 T. Bryant Pract. Surg. I. 561 The performance of *rhizodontropy [read -trypy], coupled or not with a direct opening into the abscess to evacuate the pus. |
| 1846 Lindley Veget. Kingd. 83 *Rhizogens all agree in being of a fungus-like consistence. 1849 Balfour Man. Bot. §64 [Lenticels] are considered, by Decandolle.., as being the points where young roots are produced in certain circumstances, and on that account they have been called Rhizogens. |
| 1884 Bower & Scott De Bary's Phaner. 398 Those rows of the next outer cortical layer, which lie in front of the *rhizogenetic rows. |
| 1885 G. L. Goodale Physiol. Bot. iii. 115 note, The mother-cells of this layer (the so-called *Rhizogenic cells). |
| 1848 Watts tr. Gmelin's Handbk. Chem. I. 188 *Rhizomorphs shine more brightly in oxygen gas than in common air. |
| 1830 Lindley Nat. Syst. Bot. 335 No inconsiderable number of the Fungi of botanists are.., as various *Rhizomorphas, the deformed roots of flowering plants growing in cellars, clefts of rocks, and walls. 1883 Harper's Mag. Jan. 191/2 The rhizomorpha—a curious organism resembling long, thin, dark-colored roots, sometimes expanding into a membraniform production. |
| 1871 Cooke Handbk. Fungi I. 307 Odontia fimbriata.., traversed by *rhizomorphoid threads. |
| 1858 Mayne Expos. Lex., Rhizomorphus,..*rhizomorphous. |
| 1831 Carlyle Sart. Res. iii. x, All Poor-Slaves are *Rhizophagous (or Root-eaters). 1856–8 W. Clark van der Hoeven's Zool. I. 404 Larvæ smooth, with 16 feet, subterranean, rhizophagous. |
| 1841 Penny Cycl. XIX. 119/2 Certain *Rhizostomata acquire a considerable development, so as to reach nearly a foot and a half in diameter. 1843 Owen Compar. Anat., Invertebrates 105 It may be asked, why the Cyanæa should have intestines and vents, whilst the Rhizostoma has neither. |
| Ibid. 104 The very remarkable..system of nutrition in the *Rhizostome. |
| 1836–9 Todd's Cycl. Anat. II. 409/2 The young..in the *Rhizostomatous species [are excluded] through the ramified canals of the pedicle. |
| 1858 Mayne Expos. Lex., Rhizostomus,..*rhizostomous. |
| 1876 Encycl. Brit. IV. 95/1 Different forms of *rhizotaxis. |
| 1870 Henfrey Bot. Index, *Rhizotaxy (arrangement of roots). |
| 1836 Penny Cycl. V. 247 Some sorts [of roots]..are to be cut against the wind, others after the body of the *rhizotomist has been well oiled. 1837 Whewell Hist. Induct. Sci. (1857) III. 221 The drug-sellers and the rhizotomists. |
| 1911 Brit. Med. Jrnl. 2 Sept. 523/2 Dorsal *rhizotomy failed to give permanent and complete relief [from pain]. 1955 Naffziger & Adams in A. B. Baker Clin. Neurol. III. xxviii. 1445 The conversion of a spastic into a flaccid paraplegia by anterior rhizotomy is now well established. 1977 Lancet 17 Sept. 594/2 Before the advent of drug treatment for spasticity, the only remedy lay in irreversible operations such as tenotomies and rhizotomies. |