RHA- 



275 



RHI- 



rhachitomous, see rachitomous. 



rhagon (rag'on) n. [Gk. rhax, a 

 berry.] A bun-shaped type of 

 Sponge with apical osculum and 

 large gastral cavity (zool.). 



rhamphoid (ram'foid) a. [Gk. rham- 

 phos, a beak ; eidos, resemblance.] 

 Beak-shaped. 



rhamphotheca (ram'fothe'ka) n. [Gk. 

 rhamphos, a beak ; theke, a case.] 

 The horny sheath of a bird's beak 

 (zool.). 



rheotaxis (re'otak'sis) n. [Gk. rhein, 

 to flow ; taxis, arrangement.] Re- 

 sponse to the stimulus of a water 

 current (dot.). 



rheotropic (re'otrop'ik) a. [Gk. rhein, 

 to flow ; trope, a turning.] Respond- 

 ing to current stimulus (6ot.). 



rheotropism (reot'roplzm) n. [Gk. 

 rhein, to flow ; trope, a turning.] 

 Mechanical response, positive or 

 negative, to the influence of a water 

 current (dot.). 



rhinal (rfnal) a. [Gk. rhis, nose.] 

 Of or pert, the nose. 



rhinencephalon (rfngnkeTalon, -se"f-^ 

 n. [Gk. rhis, nose ; jngkephalon, 

 brain.] The olfacffiry lobe of the 

 brain (zool.). 



rhinion (rin'Ton) n. [Gk. rhis, 

 The most prominent point at 

 the nasals touch (anat.). 



rhinocoel (rfnosel) n. [Gk. rhis, nose ; 

 koilos, hollow.] A cavity in the 

 olfactory lobe of the brain (zool.). 



rhinophore (rfnofor) n. [Gk. rhis, 

 nose ; pherein, to bear.] A process 

 on the aboral side of the eye of 

 certain Molluscs with a supposed 

 olfactory function (zool.). 



rhinotheca (rl'nothe'ka) n. [Gk. rhis, 

 nose ; theke, a case.] The sheath 

 of the upper jaw of a Bird (zool.). 



rhipidate (rip'idat) a. [Gk. rhipis, a 

 fan.] Fan-shaped. 



rhipidlum (ripid'mm) n. [Gk. rhipis, 

 a fan.] A fan-shaped inflorescence 

 (dot.), or colony of zooids (zool.). 



rhipidostichous (rip'Idos'tlkus) a. 

 [Gk. rhipis, a fan ; stichos, a row.] 

 Appl. fan-shaped fins (zool.). 



rhizanthous (rizan'thus) a. [Gk. rhiza, 

 a root ; anthos, a flower.] Produc- 

 ing a root, and a flower apparently 

 straight from it (dot.). 



rhizautoicous (rfzotoik'us) a. [Gk. 



rhiza, root ; autos, self ; \oikos, 

 house.] With antheridial and 

 archegonial branches coherent 

 (dot.). 



rhlzlne (rfzin) n. [Gk. rhiza, a root.] 

 A rhizoid (dot.). 



rhizocarp (rfzokarp) . [Gk. rhiza, 

 root ; karpos, fruit.] A perennial 

 herb (bot.). 



rhizocarpous (rfzokar'pus) a. [Gk. 

 rhiza, root ; karpos, fruit.] Having 

 perennial roots and annual stems 

 (dot.). 



rhizocaul (rfzokol) n. [Gk. rhiza, 

 root ; L. caulis, stem.] The root- 

 like horizontal portion of a Zoophyte 

 (zool.). 



rhlzocorm (rl'zokorm) n. [Gk. rhiza, 

 root ; kormos, a log.] An under- 

 ground stem like a single-jointed 

 rhizome, popularly a bulb (bot.). 



rhizogenic (rl'zqje'n'ik), rhizogenous 

 (rizfij'e'nus) a. Root -producing ; 

 arising from endodermic cells, not 

 develonadYrom the pericycle (bot.). 

 (rvzoid) <- ^Gk. rhiza, root ; 

 reserr&T^nce.] A root-like 

 outsiWth^ofrnany Mosses and 

 ytes (dot.). 



(rizSm'atus) a. [Gk. 

 rhizoma, a root.] Of the nature of 

 a rhizome (bot.). 



rhizome (rfzom) n. [Gk. rhizoma, a 

 root.] A thick stem partly along 

 and partly under the ground, send- 

 ing out shoots above and roots 

 below (bot.). 



rhizomorph (rfzomorf) n. [Gk. rhiza, 

 root ; morphe, form.] A root-like 

 hypha of certain Fungi (bot.). 



rhizomorphous (ri'zom&r'fus) a. [Gk. 

 rhiza, root ; morphe, form.] In the 

 form of a- root ; root-like (bot.). 



rhizophagous (rizofagus) a. [Gk. 

 rhiza, root ; phagein, to eat.] Living 

 on roots (zool.). 



rhlzophore (rfzofor) n. [Gk. rhiza, 

 root ; pherein, to bear.] A naked 

 branch which grows down into the 

 soil and develops roots from its 

 apex (bot.). 



rhizophorous (nzoforus) a. [Gk. 

 rhiza, root ; pherein, to bear.] 

 Root-bearing (bot.). 

 rhizoplast (rfzoplast) n. [Gk. rhiza, 

 root ; plastos, moulded.] One or 

 more root-like processes connecting 



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