5149 
rheoscopic (re-o-skop'ik), n. [< rheoscope + 
-.] Same as eleelroKeojiii'. Rheoscopic limb, 
the gaBtrocnemius of the frog with sciatic nerve attached, 
used to show the variations of electric currents, as in 
another similar preparation when its nerve is stimulated. 
rheostat (re'o-stat), . [< Or. peiv, flow, -t 
OTarof, verbal adj. of iardvai, stand: see static,] 
In electromagnetism, an instrument for regu- 
rhematic 
Such [adjectives in -aUe\ as are derived from verbs de- 
serve the precedence. And these, to avoid the ambigu- 
ousness of the term verbal, I shall take leave to denomi- 
nate rhematic. 1 . Hall, Adjectives in -able, p. IT. 
II. n. The doctrine of propositions or sen- 
tences. Coleridge. 
Rhemish(re'misii),rt. [< Rhcinw + --isli 1 .] Per- 
taining to Rheims or Reims, a city of north- 
eastern France Rhemish version, the version of 
the Xew Testament in the Douay Bible. See Bible. 
rhenet, An erroneous form of rine 3 . 
Rhenish (ren'ish), a. and . [< G. rheiiiisch, 
MHG. riniscli, rinescli, rinsch (= D. rijnsch = 
Dan. rhinsk = Sw. rhensk), < Khcin, MHG. 
Bin, OHG. Bin, Hrin (= D. Bijn = ME. Bin) 
(L. Khenun, Gr. T^wf), the Rhine; a name 
prob. of Celtic origin.] I. a. Of or pertain- 
ing to the Rhine, a river of Europe which 
rises in Switzerland, traverses Germany and 
the Netherlands, and empties into the North _,,,. 4 , sp ri,,g and ratchefor printing motion in the wrong 
Sea Rhenish archltacture, the local form assumed direction: e, spring for other barrel or cylinder; rf. non-conducting 
by Romanesque or round-arched architecture in the ^^f^^^^S^^^SS^ST^. 
eleventh and twelfth centimes in the regions bordering SMS: / conSurting cylinder; j, pin for crank when reversing 
upon the Rhine. The earliest churches seem to have mo ti ,,. 
lating or adjusting a circuit so that any re- 
quired degree of resistance maybe maintained ; 
a resistance-coil. See resistance, 3. 
rheostatic (re-o-stat'ik), a. [< rheostat + -ic.] 
Pertaining or relating to a rheostat: incor- 
rectly used to note a device of Planters, which is 
essentially a commutator, by means of which 
the grouping of a number of secondary cells 
can be rapidly changed. 
In the second class naturally figure induction coils, 
Plante's rheostatic machine, and the secondary batteries. 
E. Hospitaller, Electricity (trans.), p. 104. 
rheostatics (re-o-stat'iks), n. [PL of rheo- 
static (see -ie*).]' The statics of fluids; hydro- 
statics. 
rheotannic (re-o-tan'ik), a. [< Jtheum' 2 + tan- 
nic.] Used only in the phrase below Rheo- 
tannic add, C2oH26Oi4, a variety of tannic acid found 
in rhubarb. 
rheotome (re'o-tom), n. [< Gr. pelv, flow, + 
-ro/iop, < re/jveiv, ra/uelv, cut.] A device by 
means of which an electric circuit can be pe- 
riodically interrupted; an interrupter. 
rheotrope (re'o-trop), . [Also reotrope; < Gr. 
pelv, flow, + -TyxjTTOf, < rpiirew, turn.] An in- 
strument for periodically changing the direc- 
tion of an electric current. Faraday. 
rheotropic (re-o-trop'ik), a. [< Gr. pelv, flow, 
been circular; the circular original in the later rectangular + Tpomnof, < rpeTreiv, turn: see tropic.] \nbot.. 
determined in its direction of growth by a cur- 
rent of water. See rheotropism. 
Rhenish Architecture. Apse of the Churchof the Apostles, Cologne. 
type may perhaps be represented by the semicircular west- 
ern apse in addition to that at the east end, characteristic 
of those regions. In buildings of this style small circular 
neath the eaves, and richly carved capitals, often resem- 
bling Byzantine work, are among the most beautiful fea- 
tures. The Rhenish buildings are, however, despite much 
dignity and manifest suitability to their purpose, inferior 
in both design and ornament to those of the French Ro- 
manesque. Rhenish wine. See wine. 
II. n. Rhine or Rhenish wine. See wine. 
A' poured a flagon of Rhenixh on my head once. 
Shale., Hamlet, v. 1. 197. 
or octagonal towers are frequent. Arcaded galleries be- rheotropism (re-ot'ro-pizm), . [< rheotrop(ic) 
+ -ism.] In hot., a term introduced by Jonsson 
to denote the effect of a current of water upon 
the direction of plant-growth. In some cases the 
plant grows with the current, then exhibiting positive 
iheotropism ; in some cases against the current, exhibit- 
ing negative rheotropism. 
rhesian(re'shi-an),a. [< rhesus + -ian.] Char- 
acteristic of the rhesus ; monkey-like : as, rhe- 
sian antics. Literary World, Oct. 31, 1885. 
rheochord (re'o-kdrd), . [< Gr. 'pelv, flow, + rhesus (re'sus),w. [NL.,<L.7e6-s,<Gr.'P7(jof, 
Xopif/, a chord : see chord.] A metallic wire a king of Thracia, a river of the Troas, a river 
used in measuring the resistance or varying - T> - i1 -- - i - i " 
the strength of an electric current, in propor- 
tion to the greater or less length of it inserted 
in the circuit. 
Rheoideae (re-oi'de-e), n. pi. [NL., < It/tea^ + 
-oideas.] The Bheidse rated as a superfamily: 
same as Rltese. 
rheometer (re-om'e-ter), n. [Also reometer; 
= F. rheometre; irreg. < Gr. pelv, flow, + /ifrpov, 
a measure.] 1. An instrument for measuring 
an electric current ; an electrometer or gal- 
vanometer. 2. An instrument for measuring 
the velocity of the blood-flow, 
rheometric (re-o-met'rik), a. [< rheometer + 
-ic.] Pertaining to a rheometer or its use ; 
galvanometric. 
rheometry (re-om'e-tri), re. [As rheometer + 
-i/ 3 .] 1. In niath., the differential and integral 
calculus; fluxions. 2. The measurement of 
electric currents: galvanometry. 
rheomotor (re'o-mo-tor), n. [< Gr. pelv, flow, 
+ L. motor, a mover.] Any apparatus, as :m 
electric battery, by which an electric current 
is originated. 
rheophore (re'6-for), . [Also reophore; < Gr. 
peiv, flow, + -ipopof, < Qipeiv = E. bear 1 .] A gen- Rhetian, ". and H. See lilnetian. 
eral name given by Ampere to the conductor Rhetic, <t. Same as Bhxtic. 
joining the poles of a voltaic cell. rhetizite, . See rhfetizitf. 
rheoscope (fe'o-skop), . [< Gr. pelv, flow. + rhetor (re'tgr) t n. [< ME.jethor, < OF. rehir, 
in Bithyuia, etc.] 1. A macaque, Macacus 
rhesus, one of the sacred monkeys of India. 
It is 18 inches long, 
the tail 6 or 8 inch- 
es, and mostly of 
a yellowish-brown 
color. It is a near 
relative of the com- 
mon Javan ma- 
caque, M. ajnomal- 
gus, of the Malay 
bruh, M. nemestn- 
nus, and of the bon- 
net-macaque or 
munga, M. sinicus, 
and in some re- 
spects, as length of 
tail and formation 
of the "bonnet," 
holds an interme- 
diate position be- 
tween the extremes in this large and varied genus. The 
rhesus is widely distributed in India, both in the hill-coun- 
try and on the plains, where it is known by the native 
name bunder. It runs into several varieties, which have 
received technical specific names, and is among the mon- 
keys commonly seen in zoological gardens and menageries. 
2. [fa/'.] [NL.] In mammal., same as Maca- 
cus. 3. [//.] In entom., a genus of coleop- 
terous insects. Lacordaire, 1869. 
Khesus Monkey (Mac, 
lv, view.] An instrument by which tho 
existence of an electric current may be ascer- 
tained : an electroscope. 
F. rhdieur = It. reiore, < L. rhetor, a teacher 
of oratory, a rhetorician, also an orator, < Gr. 
fii/rup, a 'speaker, orator, < epeh>, elpeiv (pret. 
rhetoric 
), say, speak: see verb.] 1 . A rheto- 
rician; a master or teacher of rhetoric. 
Myn English eek is insufficient; 
It moste ben a rethor excellent, 
That coude his colours longing for that art, 
If he sholde hir discriven every part. 
Cha-jcer, Squire's Tale, 1. 30. 
Your hearing, what is it but as of a rhetor at a desk, to 
commend or dislike'; 
Hammond, Works, IV. 514. (Latham.) 
2. Among the ancient Greeks, an orator. Specif- 
ically (a) One who made it his occupation to speak in 
the ecclesia or public assembly, and often to devote him- 
self unofficially to some particular branch of the admin- 
istration ; a political orator or statesman, (b) One who 
made it his occupation to prepare speeches for other citi- 
zens to deliver in their own cases in court, and to teach 
them how to deliver them, act as an advocate, give in- 
struction in the art of rhetoric, and deliver panegyrics or 
epidictic orations ; hence, a professor of rhetoric ; a rheto- 
rician. 
They are (and that cannot be otherwise) of the same pro- 
fession with the rhetorics [read rhetores?] at Rome, as much 
used to defend the wrong as to protect and maintain the 
most upright cause. Bp. Hadtet, Abp. Williams, 1. 72. 
When a private citizen had to appear before court, the 
rhetor who wrote the speech for him often tried to make 
him appeal- at his beat Amer. Jour, of Philol., VI. 341. 
rhetoriant, [ME. rethoryen ; < rhetor + -tan.] 
Rhetorical. 
The suasion of swetenesse rethoryen. 
Chaucer, Boethius, ii. prose 1. 
rhetoric (ret'pr-ik), M. [Early mod. E. rhetorick, 
rcthoryck; < 'ME. retorike, rethoryke, retoryke, 
retoryk (also rethorice, after L. rhetorice), < OF. 
rhetorique, rectorique, F. rhetorique = Pr. retho- 
rica = Sp. retorica = Pg. rhetorica = It. retorica, 
rettorica, < L. rhetorica (sc. ars), also rhetorice, 
< Gr. prfTopiK-f/ (se. rexvij), the rhetorical art, fern, 
of prrroptK6f (> L. rhetoricus), of or pertaining to 
a speaker or orator, rhetorical, < pijrup, a speak- 
er, orator: see rhetor.] 1. The art of dis- 
course ; the art of using language so as to in- 
fluence others. Rhetoric is that art which consists in 
a systematic use of the technical means of influencing the 
minds, imaginations, emotions, and actions of others by the 
use of language. Primarily, it is the art of oratory, with 
inclusion of both composition and delivery; secondarily, 
it also includes written composition and recitation. It is 
also used in narrower senses, so as to present the idea of 
composition alone, or the idea of oratorical delivery (elocu- 
tion) alone. Etymologically, rhetoric is the art, or rather 
the technics {Tt\<n>, somewhat different in scope from our 
art), of the rhetor that is, either the popular (political) 
orator or the judicial and professional rhetor. Accord- 
ingly, ancient writers regarded it mainly as the art of per- 
suasion, and something of this view almost always attaches 
to the word even in modern use, so that it appears to be 
more or less inappropriate to use rhetoric of mere scien- 
tific, didactic, or expository composition. The element 
of persuasion, or at least of influence of thought, belongs, 
however, to such composition also in so far as accurate 
and well-arranged statement of views leads to their adop- 
tion or rejection, the very object of instruction involving 
this. On the other hand, poetry and epidictic oratory 
chiefly address the imagination and emotions, while the 
most important branches of oratory (deliberative and ju- 
dicial oratory) appeal especially to the mind and emotions 
with a view to influencing immediate action. The theory 
or science underlying the art of rhetoric, and sometimes 
called by the same name, is essentially a creation of the 
ancient Greeks. Rhetoric was cultivated on its more 
practical side first of all by the earlier rhetors (so-called 
"sophists") and orators (Empedocles considered the in- 
ventor of rhetoric Gorgias, Isocrates, etc.), many of whom 
wrote practical treatises (re^i-ai) on the art. The philos- 
ophers, on the other hand, among them Aristotle, treated 
the subject from the theoretical side. The system of rheto- 
ric which finally became established, and has never been 
superseded, though largely mutilated and misunderstood 
in medieval and modern times, is that founded upon the 
system of the Stoic philosophers by the practical rhetori- 
cian Hermagoras (about 60 B. c.). Its most important 
extant representatives are Hermogenes (about A. D. 165) 
among the Greeks, and Quintilian (about A. D. 95) among 
the Latins. This theory recognizes three great divisions 
of oratory. (See oratory.) The art of rhetoric was divided 
into five parts: invention, disposition, elocution (not in 
the modern sense, but comprising diction and style), 
memory (mnemonics), and action (delivery, including the 
modern elocution). 
With rethorice com forth Musice, a damsel of oure hows. 
Chaucer, Boethius, ii. prose 1. 
General! report, that surpasseth my praise, condemneth 
my relhoriflre of dulnesse for so colde a commendation. 
Sashe, quoted in Int. to Pierce Penilesse, p. xxv. 
For rhetoric, he could not ope 
His mouth, but out there flew a trope. 
Butler, Hudibras, i. 81. 
2. Skill in discourse ; artistic use of language. 
3. Artificial oratory, as opposed to that which 
is natural and unaffected ; display in language ; 
ostentatious or meretricious declamation. 
Enjoy your dear wit, and gay rhetorick, 
That hath so well been taught her dazzling fence. 
Milton, Coraus, 1. 790. 
Like quicksilver, the rhet'ric they display 
Shines as it rune, but, grasp'd at, slips away. 
Courper. Progress of Error, 1. 21. 
4. The power of persuasion ; persuasive influ- 
