pyloridean 
pyloridean (pi-lo-rid'e-an), a. and M. [< NL. 
fglgridta + -mi'.] I. './. Gaping, as a bivalve 
mollusk; of or pertaining to the Pyloridea. 
II. //. A member of the Pyloridea. 
pyloristenosis ( pi-lp-ris-te-no'sis), w. [NL., < 
(ir. -i'/upof, pylorus, + ortixjoif, a narrowing, 
Htraitening, < arcvoiv, narrow, straiten, OTCV&S, 
narrow, strait. ] Morbid contraction of the py- 
lorus. 
pylorochesis (pi-16-ro-ke'sis), M. [NL., < Gr. 
xivupaf, pylorus, + o'xi/oic, a carrying, driving 
(taken in sense of 'holding'). < ojciv, bear, car- 
rv, drive, < ix c ' v i hold, have.] Obstruction of 
the pylorus. 
pylorus (pi-16'rus), n. ; pi. pylori (-ri). [NL.,< 
LiL. pylorus, < Gr. m^upAf, also irvfovpAf, a gate- 
keeper, also the lower orifice of the stomach, < 
-i'/!/, a gate, a pass, + upa, Ionic 1017, eare, heed, 
or ofpof, a watcher or warder, < opav, see.] 1. 
In the early church, a doorkeeper; an ostiary 
(which see). 2. In anat. : (a) The orifice of 
communication between the stomach and the 
intestine, by which the contents of the stomach 
pass into the intestine, it i> usually situated on the 
right-hand aide, opposite the cardiac or esophageal or! nee, 
but may closely approximate or be adjoined to the latter. 
See out under stomach, (ft) The fold of mucous 
membrane, containing muscular fibers, which 
guards the pyloric orifice, or other contrivance 
for retarding or opposing the passage of food 
from the stomach into the intestine, (c) The 
pyloric end or division of the stomach. 3. In 
Hydrozoa, a valvular structure which separates 
the gastric from the somatic cavity in the si- 
phonophorous hydrozoans Antrum pylori See 
outrun. Sphincter pylori, a bundle of unstrlped mus- 
cular fibers encircling the pyloric end of the stomach. 
pymma (pim'a), n. Same as bloodicood, 4. 
pympert, <' t- An obsolete variant (or misprint) 
of pamper. 
Good mistress Statham, . . . seeing what case I was In, 
hath fetched me home to her own house, and doth pymper 
me up with all diligence, for I fear a consumption. 
Latiiarr, Sermons and Remains (Parker Hoc.), P- 386. 
((Daviei.) 
pynaclet, >. A Middle English form of pinnacle. 
pyncht, ' An obsolete spelling of pinch. 
pyndt, pyndert. Middle English forms of pind, 
pinder. 
pynet. and r. A Middle English spelling of 
pint/*. 
pynnet, " and v. A Middle English form otnin 1 . 
pyoblennorrhcea (pi-o-blen-o-re'S), . [NL., < 
Or. nrov, pus, + ftMvvo^, mucus, -4- poia, a flow, 
< pelv, flow. Cf. blennorrhea.] Muco-purulent 
discharge. 
pyochezia (pi-o-ke'zi-a), n. [NL-, < Gr. irimi, 
pus, + xi&tv, ease oneself.] The condition in 
which pus is discharged by the intestine. 
pyocoelia (pi-o-se'li-ft), . [NL., < Gr. ninv, pus, 
-f- not/la, a cavity: see ctelia.] The presence 
of pus in the abdominal cavity. 
pyocolpos (pi-o-kol'pos), n. [NL., < Gr. xi<m>, 
pus, + <to>.TOf, womb.] The presence of pus in 
the vagina. 
pyocystis (pi-o-sis'tis), n. [NL.,< Gr. irixrv, pus, 
+ ici'ffrif, bladder: see rystix.] An encysted col- 
lection of pus. 
pyogenesis (pi-o-jen'e-sis), w. [NL., < Gr. TTIXW, 
pus, + fiveoic, ongin, source: see <jFCHeM.] The 
generation of pus ; the theory or process of the 
formation of pus. Also pyogenia. 
pyogenetic (pi'o-je-net'ik), a. [< pi/agenesis, 
after genetic.] Pertaining to pyogenesis; pyo- 
genic. 
pyogenia (pi-^-jS'ni-ii), . [NL., < Gr. irlm>, 
pus, + -ytvcia, < -JTW> producing.] Same as 
pyogeitesis. 
4872 
pyonephrosis (pi'o-nef-ro'sis), . [NL., < Gr. 
-i iii\ pus, + vt^pof, kidney, + -o#w.] The pres- 
eni-e of pus in the kidney and its pelvis. 
pyonephrotic (pi'o-nef-rpt'ik), n. [< pynneph- 
rosi (-ot-) + -to.] Pertaining to pyonephrosis. 
pyoningt, See pinning. 
pyonyt. An obsolete form of pinny, JH-OHII. 
pyopericardium (pi-o-per-i-kar'di-um), n. 
[NL., < Gr. irvov, pus, + NL. pericardium : see 
IH r/c(i;v//m.] The presence of pus in the peri- 
cardial sac. 
pyoperitonitis (pi-o-per'i-to-ni'tis), M. [NL., 
< Gr. iri'ov, pus, + NL. peritonitis, q. v.] Sup- 
purative peritonitis. 
pyophthalmla (pi-of-thal'mi-a), . [NL. , < Gr. 
iriiov, pus, + !K^6a>.fiia, a disease of the eyes: see 
ii/iliiliii/n/i<i.\ Production of pus in the eye. 
pyopneumothorax (pi-o-nu-mo-tho'raks), n. 
[NL., < Gr. iri'ov, pus, + irvcii/ujv, lung, + 
pyogenic (pi-6-jen'ik), a. [< Gr. wimv. pus, 
+ -yrviK, producing, + -c.] Having relation 
to the formation of pus; producing or generat- 
ing pus. Pyogenic fever, pyemla, 
pyohemothorax (pi-o-ne-mo-tho'raks), . 
[NL., irreg. < Gr. irmv, pus, + alfia, blood, + 
Oupafj thorax.] The presence of pus and blood 
in the pleural cavity. 
pyoid (pi'oid), a. [< Gr. irvoeiifc, like pus, < 
iriin; pus, + rMof, form.] Having the nature 
of or resembling pus; purulent. 
pyolymph pi'o lirnf), n. [< Gr. iriov, pus, + 
Nl.. li/niplm, lymph: nee lym/ih.] Lymph some- 
what turbid with pus-corpuscles. 
pyometra (pi-o-mu'trft), . [NL., < Gr. jrfov, 
JIMS, -f- /if/Tpa, uterus!] The presence of pus 
in the uterus. 
pyonephritis (pi'6-nef-ri'tis), n. [NL., < Gr. 
iriov, pus, + NL. nrjiliritiii, q. v.] nuppurative 
inflammation of the kidne\ . 
thorax.] Same &s pneumopyothorax . 
pyopoesis (pi'o-po-e'sis), n. Same tapyopoiesis. 
pyopoiesis (pt'o-poi-e'sis), n. [NL., < Gr. irvov, 
pus, + Ttoir/ois, production, < wotelv, make.] Sup- 
puration ; production of pus ; pyosis. Also pyo- 
pocsiti. 
pyoptysis (pi-op'ti-sis), . [NL., < Gr. vvov, 
pus, + irri-oic, a spitting, < irrvetv, spit.] Ex- 
pectoration of pus. 
pyorrhea, pyorrhcea (pi-o-re'S), n. [NL. pyor- 
rhoea, < Gr. irvov, pus, + pota, a flow, < pelv, 
flow.] Purulent discharge. Pyorrhcea alyeo- 
lalla, an alveolar abscess. 
pypsalpingitisijpi-o-sal-pin-ji'tis), M. [NL.,<Gr. 
tritov, pus, + ofairiyf (o-a>.jr;j)-), a tube, + -ito.] 
Purulent inflammation of a Fallopian tube. 
pyosalpinz (pi-o-sal'pingks), n. [NL., < Gr. 
Trov, pus, + oaXmjf, a tube.] The presence of 
pus in a Fallopian tube. 
The difficulty of accurate diagnosis between a pyotal- 
pinx and a hydrosalplnx . . . must here be taken into ac- 
count. Lanctt, >'o. 3477, p. 837. 
pyosapremia (pi'o-sap-re'mi-a), w. [NL., < Gr. 
JTIWP, pus, + oaxpof, rotten, + ai/ia, blood.] The 
infection of the blood with a purulent exudate, 
as pus. 
pyoscope (pl'6-skop), w. [< Gr. vim; pus, + 
aKamh; view.1 An instmment for the deter- 
mination of the amount of fat in milk. 
pyosis (III-O'HJS), M. [< Gr. iri'uatf, suppuration, 
< iruuiT, cause to suppurate, < Trim; pus: see 
j>u.v.] The progress or formation of pus. 
pyott, . See;>i>f. 
pyothorax (pi-o-tho'i-akx). H. [NL., < Gr. 7rtwi, 
pus, + Oupai-, thorax.] The presence of pus in 
a pleural cavity ; empyema. 
He had seen the rapid formation of an abscess follow an 
exploratory puncture in a case of tulwrculous pyothorax. 
Lancet, No. 8479, p. 989. 
pyracanth (pir'a-kanth), w. [< Gr. irvpaitavda, 
a variety of thorn, < iri<p, fire, + Aicaitfof, a prick- 
ly tree, a thorn.] A thorn, Cratsegus Pyra- 
cantlia, found in the south of Europe. 
pyracid (pi-ras'id), . Same as pyro-acid. 
pyral (pi ral). . [< pyre + -/.] Of or per- 
taining to a pyre. 
Whether unto eight or ten bodies of men !" adde one of 
a woman, as being more inflammable, and unctuously con- 
stituted for the better pyraU combustion, were any ra- 
tional practise. Sir T. Brmme, Urn-burial, IT. 
In connection with each house supposed by Mr. Cushing 
to be the house of a clan or one of the sociological divi- 
sions, such as are found among the Pueblo Indians, was 
what the explorer calls a pyral mound. On this the bod- 
ies and effects of the dead were consigned to flre. 
Science, XII. 40. 
pyralid(pir'a-lid), a. andn. I. a. Resembling 
11 moth of the family Pyralidx ; belonging to 
this family; pyralideous. 
H. n. A pyralid moth; any member of the 
Pyralidie or Pyralidina. 
Also pyraliitiin . 
Pyralidse (pi-ral'i-de), . pi. [NL. (Leach, 
1819), < Pymliit + -iV/-.] A heterogeneous fam- 
ily of moths, of uncertain limits and characters. 
They are generally of medium size or small, with slender 
bodies and long legs, and with both maxillary and labial 
palpi. The family has In fact for many years been a rest- 
ing-place for genera which do not find place in the othrr, 
better denned, families. Also ffrralidtna, and preferably 
ritralididir. See cut under bre-motit. 
pyralideous (pir-a-lid'f-us), a. [< iiyrnlid + 
-ei>ns.\ I'vnilid; of or pertaining to the I'l/rn 
liiliiiii: as, "the iHii-iiliitiiHu group." Staintim. 
Pyralididse(pir-a-iid'i-de), .pl. [NL.] Same 
us l'i/r<i/iilte. 
pyralidiform (pir-a-lid'i-f6rm). <i. [< NL. Py- 
nilis (-ill-) + \,.j'nnnii, form.] Having the t'.n-iu 
or structure of a pyralid moth; pynilidine or 
pyralideous; belonging to the 
pyramid 
Pyralidiformia (pir-a.lid-i-fAr'mi-|), n. pi. 
[NL.: wr pyriilidiform.'} A group of pyralidi- 
form or pyralideous moths, tichrank, 1802. 
Pyralidina (pir'a-li-dl'na), n.pl. [NL., < Py- 
i-iiii.i (-id-) + -i 2 .] Same as Pvralidx. 
pyralidine (pi-ral'i-din), a. and n. Same as 
pyralid. 
Pyralia (pir'a-lis), . [NL. (Schrank, 1801), < 
L. pyrnlix, < Gr. irvpaMf, irvppaMc, a winged in- 
sect supposed to live on fire, < ~<'p, fire: see 
wyre.] A genus of moths, typical of the family 
Pyralidtf, having a conspicuous proboscis and 
ascending palpi. About a dozen species are 
known, mainly European. P. farinalis is a 
cosmopolitan flour-pest. 
pyrallolite (pi-ral'o-lit), . [So called as tak- 
ing another color; <Gr. iri'p, flre, + dX/oj, other, 
+ /j'Sof, stone.] A white or greenish altered 
variety of pyroxene, found in Finland. 
pyramid (pir'a-mid), n. [Formerly also, as L., 
pyramix, pi. pyramides ; = F. pyramide, for- 
merly piramide = 8p. pirdmide = Pg. piramidr, 
pyramide = It. piramide = D. piramiede = Q. 
pyramide = 8w. pyramid = Dan. pyramide, < L. 
pyramis (-mid-), < Gr. irvpaftif (-/tio-), a pyramid, 
perhaps < Egypt, pir-em-us, the slanting edge of 
a pvraraid. Some have imagined a connection 
with Gr. -i />, fire, as if named from the resem- 
blance to a tapering flame.] 1 . A massive struc- 
ture of polygonal, usually square plan, the sides 
of which slope, each usually in one plane, to a 
common apex. Pyramids have been erected In differ- 
ent parts of the world, especially in Egypt, where there 
are numerous groups In different styles of execution and 
states of preservation. By far the most Interesting of these 
groups is that of Ghizeh, near Cairo, where there are three 
pyramids of large size, and several smaller one*. All the 
Egyptian pyramids were built for tombs, and certainly in 
most cases, if not in all, for royal personages. They are re- 
markable not only for the great size of many of them, but 
for the manner In which they were hermetically sealed, 
there being no external opening of any kind, nor any in- 
dication of the place in which the mummy had been de- 
posited; on the contrary, some of them exhibit very In- 
genious arrangements intended to lead astray those search- 
The Pyramids of Ghizch. Egypt- 
ing for the sepulchral chamber. Everything was planned 
in their construction to insure permanence, concealment, 
and security from violation. Of the three great pyramids 
at Qhlzeh, the largest and by far the most important and 
interesting is the so-called Ureat Pyramid, in regard to 
which a very extensive literature exists, and which has 
frequently been measured and elaborately described. It 
is the largest work of man's bands In the world, having 
been originally 481 feet In height, and each of the sides of 
Its very nearly square Imse measuring on the average 
nearly 750 feet (DOK8.3 in., Petrle). It Is the only one re- 
maining of the "seven wonders of the world." Its Inte- 
rior structure Is more elaborate than that of any of the 
other pyramids, and some of the features which it displays 
are peculiar, and remarkable as showing the desire of the 
builders that at least one geometrical fact of fundamental 
importance should be incorporated into the structure. 
1 bus the height of the Great Pyramid bears, with remark- 
able precision, the same relation to the total length of the 
four sides of its base that the radius of a circle nas to it* 
circumference, and other indications of the w ratio exist 
in its interior. This and other Interesting peculiarities of 
this pyramid have led various persons, some of whom have 
been eminent in science, to adopt the view that It was a 
divinely inspired building, and that the so-called "coffer" 
contained within the principal sepulchral chamber was 
intended to serve as a standard of weights and measures 
and a record of various fundamental facts In geophysics, 
and not for a sarcophagus. Of the manner in which the 
huge stones of which this pyramid Is built were raised to 
Hi. ii present position but little Is definitely known, but 
It Is Inferred that the work was done without the aid nf 
complicated machinery ; that they were shaped to a very 
considerable extent at least by the use of sows of bronze, 
the teeth of which were gems or ban! stones, has been 
clearly shown hy the most recent investigations. The 
date of I lie ( ireut Pyramid, which I* !><li<\<il to have been 
built b> or for Kini: >lm fit <rheops)of the fourth dynasty. 
Is variously flicd Ky I '.nyp'ologista at from 2460 to 4235 
I lie latter is the dale assigned by Marlette. 
2. In gconi., a solid I'mitiiined by :i plane poly- 
gon as bane and other planes meeting in a 
point. This point Is called the vertex of the pyramid; 
and the planes which meet In tlicrei- '1 the 
