pyrolatry 
pyrolatry (pi-rd'a-tri), n. [< Or. m>, fire, + 
fiirpiiu. worship.] The worship of fire; fire- 
worship. 
Pyrolea (pi-ro'le-e), n. pi. FNL. (Lindl. v. 
ISL'l), < Pyrula + -fit.'} A tribe of plants of 
the gamopetalous order Kricaceje, the heath 
family, unlike the rest of the order in its poly - 
petalous corolla and herbaceous habit, ana also 
characterized by a loculicidal capsule, five im- 
bricated deciduous petals, and a perennial 
creeping rhizome. It lnclude> about 21 species In the 
three genera Pyrula, Monaet, and Chimaphua, all small, 
smooth, shining evergreen herbs of northern temperate 
regions, and well represented In the United States. See 
the above genera, and compare Ericaeea. Also I'yro- 
lacete. 
pyroleter (pi-rol'e-t6r), n. [< Or. m>p, fire, + 
oArrfp, destroyer, < a&Uuxu, destroy.] An ap- 
paratus for the extinction of fire, especially on 
board ships, by which hydrochloric acid and 
sodium bicarbonate, partly dissolved and part- 
ly suspended in water, are pumped into a cyl- 
inder, and the carbonic acid there generated is 
projected on the fire. 
The pynleter Is a small double pump worked by hand, 
which sucks up from tubes on either side muriatic acid 
and a solution of carbonate of soda. These mingle In a 
generator forming part of the pump. The carbonic acid 
gas formed and the solution of salt and acid pass at once 
down a metal pipe to the hold ; along the keelson of the 
ship runs a perforated wooden box, which admits the dry 
carbonic acid gas amongst the burning materials. 
Un, Diet., IV. 712. 
pyroligneous (pi-ro-lig'ne-us), a. [< Gr. vvp, 
fire, + L. ligneus, of wood : see ligneous.] Gen- 
erated or procured by the distillation of wood. 
Also pyrolignous Pyroligneous acid, impure acetic 
acid obtained by the distillation of wood. Pyrollgneoua 
alcohol, methylic alcohol Pyrollgneous vinegar, 
wood-vinegar. 
pyrolignic (pi-ro-lig'nik), a. [< Gr. irvp, fire, 
-I- L. lignum, wood, + -ic.] Same as pyrolia- 
HfOUX. 
pyrolignite (pi-ro-lig'nit), n. [< pyrolign(ic) 
+ -ite*.] A salt of pyroligneous acid. 
pyrolignous (pi-ro-lig'nus), a. [< Gr. mip, fire, 
+ L. 7</oiis, like wood: see lignous.] Same 
as purolinneous. 
pyrolithic (pi-ro-lith'ik), a. [< Gr. n-ip, fire, + 
/Mor, stone.] In ehem., same as cyanuric. 
pyrologist (pi-rol'o-jist), . [< pyrolog-u + -<.] 
One wno is versed in the doctrines of neat ; an 
investigator of the laws of heat. 
pyrology (pi-rol'o-ji), n. [< Gr. Jri'p, fire, + 
-Xov/a, \Uyto>, speak : see -ology."} The science 
of heat, latent and sensible. 
pyrolusite (pi-ro-lu'sit), n. [< Gr. nip, fire. + 
Aoi'ffif, a washing (< )MCIV, wash), + -ite*.~\ Na- 
tive manganese dioxid i Mn< >._,). a common ore 
of manganese, occurring crystallized and mas- 
sive, of a gray color and metallic luster, it parts 
with a portion of Its oxygen at a red heat, and is on this 
account used to discharge the brown or green tints of glass, 
whence Its name. When crystallized it has often the form 
of manganite. from which it has been, at least in many 
cases, derived by alteration. It Is very soft, and is readily 
distinguished by this property from the other form of 
manganese dfoxld, called polianite. 
pyromagnetic (pi'ro-mag-net'ik), a. [< Gr. 
-r/>. fire, + E. iii<if/,niir.\ Relating to magnet- 
ism as modified by heat: noting a dynamo 
and motor of novel construction, devised by 
Edison, the operation of which depends on the 
fact that the intensity of magnetization of iron 
diminishes as the temperature increases. 
pyromancy (pi'ro-man-si), n. [< ME. *piro- 
mancie, perimancie, < OP. 'piromanrie, piro- 
ntance, pyromance, < ML. pyromantia, pyrouum- 
cia, < Gr. irvpo/iavrria, divination by fire, < irvp, 
fire, + iMvreia, divination.] Divination by fire, 
or by the forms appearing in fire. 
Nlgromancye and ptrimancie the pouke to rise maketh ; 
3lf thou thence Dowel dele with hem neucre. 
Fieri I'luu-man (AX xl. 168. 
Ainphfaraus was the first that had knowledge of /*/n*- 
inancie, and gathered signs by speculations of flre. 
Holland, tr. of Miny, vii. 6ft. 
pyromanla (pl-ro-ma'ni-|), n. [< Gr. irip, fire, 
+ fuivin, madness.] A mania for destroying 
things by fire; a form of insanity marked by a 
mania for setting things on fire. 
pyromaniac (pi-ro-ma'ni-ak), a. and w. [< pyro- 
nuinia + -ac.} Ii a. Of, pertaining to, charac- 
terized by, or affected with pyromania. 
II. n. A person possessed of a mania or ir- 
resistible impulse to burn things. 
As pifritinaniaen rarely Incriminate themselves, it be- 
comes the more Important to study the many indications 
by which the diagnosis can be made by indirect examina- 
tions. Amer. Jour. Piyehal., I. 191. 
pyromaniacal (pi'ro-ma-ni'a-kal), . [< /.///<- 
miininr + -'.] 1. Affected with i>r having a 
4876 
tendency to pyroraania : as, pyromaniacal per- 
sons. 2. Caused by pyromamacs : &s,pyrom<i- 
iiiin-iil fires. 
pyromantic (pi-ro-man'tik), o. and n. [< pyro- 
mancy (-mant-) -f- -ic.] I. o. Pertaining to 
pyromancy. 
II. n. One who pretends to divine by means 
of fire. 
pyrometamorphism (pi-ro-met-a-m&r'fizm), n. 
[< Gr. mip, fire, -r- E. metamorphism.] Meta- 
morphism resulting from the action of heat, as 
distinguished from hydrometamorphism, that 
produced by water. See me tumor )>hism. 
pyrometer (pi-rom'e-ter), . [< Gr. mp, fire, + 
JuTpov, measure.] An instrument, in the form 
of a simple metallic bar, employed by Muschen- 
broek, about 
1730, for mea- 
suring the 
changes pro- 
duced in the 
dimensions of 
solid bodies 
by the appli- 
cation of heat. 
The name is now 
applied, how- 
ever, to any in- 
strument the ob- 
ject of which Is to 
measure all gra- 
dations of tem- 
perature above 
those that can be 
indicated by the 
mercurial ther- 
mometer. Wedg- 
wood's pyrome- 
ter, the first 
which came Into 
extensive use, 
was employed by 
him for testing 
the heat of his 
pottery- and 
porcelain - kilns, 
and depended 
on the property 
of clay to con- 
tract on exposure 
to heat. Many 
different modes 
have been pro- 
posed or ac- 
tually employed 
for measuring 
which connects with dial through tube A high tempera- 
ted at f. ^.pyrometer in which the mo- tures: as (a) by 
contraction, as in 
Wedgwood's ; (6) 
by the expansion 
of bars of differ- 
ent metals; (e)by 
change of pressure in confined gases, as In Lamy's instru- 
ment, or by the expansion of gases, as In the air-ther- 
mometer ; (d) by the amount of heat imparted to a cold 
mass, as in Siemens'! Instrument ; (e) by the f uslng-polnt 
of solids; (/) by conduction and radiation of heat (see 
> (ff) h y color, as red and white heat ; (h) by 
pyrophosphate 
pyronomics (pi-ro-nom'iks), . [< Gr. itvp, fire, 
+ ro/iof, law.] The science of the properties 
and action of heat. [Rare.] 
pyrope (pi'rop), n. [< Gr. wpuir6f, a kind of 
red OTonze, prop, adj., fire-eyed, fiery, < trip, 
fire, + tity, eye.] Fire-garnet, or Bohemian gar- 
net, a dark-red variety of garnet, sometimes 
used as a gem, found embedded in serpentine 
at Budweis in Bohemia and elsewhere, it be- 
longs to the magnesia-alumina variety of the species, and 
often contains also some chromium. See yarned. 
pyrophane (pi'ro-fan), n. [< Gr. rriyj, fire, + 
faiveiv, show.] A kind of opal (hydrophane) 
which by the absorption of melted wax is ren- 
dered translucent so long as it is hot, but be- 
comes opaque again on cooling. 
pyrophanous (pi-rof 'a-uus), a. [< Gr. trip, fire, 
T 0a/Vf'v, show.] Rendered transparent or 
translucent by heat. 
Pyrophlla (pi-rofi-lft), n. [NL. (Stephens, 
1829), < Gr. trip, fire, + ftfeiv, love.] A genus 
of noctuid moths, containing a number of spe- 
D 
Pyrometers. 
^.pyrometer (Gauntlett's) in which the point- 
er of dial d is turned by the unequal expansion 
of rods e, which are made fast at / .' t consists 
of three brass or copper rods surrounding one 
of iron ' ' 
supported at f . H, pyi 
tive power is a coil or wire inside ''. the con 
necting rods passing through tube A' to dial at 
tf . C, pyrometer with screw-shaped metallic 
coil within the tube *A". which, when heated, 
moves the pointer of dial at r". 
change In the velocity of sound; (t) by the resolution 
of chemical compounds ; (j) by generation of electricity, 
as in Becquerel's thermo-electric pyrometer ; and (*) by 
change in resistance to electricity, as in the instrument 
invented by Siemens, which may be adapted to measuring 
either high or low temperatures. 
pyrometric (pi-ro-met'rik), a. [As pyrometer 
-r -ic.] Pertaining to the pyrometer, or to its 
use; ascertained or shown by means of the 
pyrometer. 
pyrometrical (pi-ro-met'ri-kal), a. [< pyro- 
metric + -"'] Same as pyrometric. 
pyrometrlcally (pi-ro-met'ri-kal-i), adv. In a 
pyrometric manner; 'with or by means of the 
use of the pyrometer. 
pyrometry (pi-rom'e-tri), n. [< Gr. m>p, fire, 
T -fifrpia, < utrpov, a measure.] That branch 
of science which treats of the measurement of 
heat ; the act or art of measuring amounts or 
degrees of heat. 
pyromorphlte (pi-ro-m&r'fit), n. [So called in 
allusion to the peculiar crystalline form which 
a fused globule assumes on cooling ; < Gr. ni'p, 
fire, + poppi/, form, + -<c 2 .] Native phosphate 
of lead with lead chlorid . It Is a mineral of a green, 
yellow, or brown color, crystallizing in hexagonal prisms, 
and Isomorphous with apatite, mimetlte, and vanadinlte. 
It also occurs massive In globular, reniform, fibrous, moss- 
like, granular, or earthy forma. Often called green trad 
an. 
pyromorphous (i>i-ro-m6r'fus), a. [< Gr. m>p, 
fire, + pi/itf, form, -h -ous.] In //'< nil., hav- 
ing the property of being crystallizable upon 
fusion. 
pyronaphtha ( pi-ro-naf 'thtt), n. [< Gr. n-rp. fire, 
-f- vd+9a, naphtha : see MpJUM.] An illuminat- 
ing agent which has been prepared in K'u->i:i 
from the waste products of thf> distillation of 
Baku petroleum. It hums with a bright " 
Pyramidal Crape-vine Moth and Worm (Pyrvphila fyrami 
cies which are destructive in their larval states. 
/'. pyramidaidet is the pyramidal grape-vine worm of the 
I'nited States, which damages grape-vines, and also rasp- 
berry, poplar, and red-bud (Ctrcit). 
pyrophobia (pi-r^-fo'bi-ii), n. [< Gr. viip, fire, 
+ -<jK>[iia, < 0o$of, fear.] A morbid dread of fire. 
pyrophone (pi'ro-fon), . [< Gr. viip, fire, + 
fuvy, sound, tone.] A musical instrument in 
which the tones are produced by means of 
burning jets of hydrogen inclosed in gradu- 
ated glass tubes. It was invented about 1875 
by Frederic Kastner. Sometimes called chemi- 
cal harmonicon. 
pyrophor (pi'rp-fdr), n. [< Gr. Tru/x^dpof, fire- 
bearing: ttee pyrophore.] A name sometimes 
given to the stirrup-lantern. 
pyrophore (pi'ro-for), . [< Gr. wvpnpAias, fire- 
bearing, < iri'p, fire, + <ffpta>= E. freari.] 1. 
A body which will become ignited if exposed 
to air or water, such as self-lighting logs in- 
tended for use at sea in facilitating the rescue 
of a person who is overboard. 2. A composi- 
tion or an apparatus for kindling fire. 
pyrophoric (pi-ro-for'ik), a. [< NL. pyropho- 
r(tt*) + -if.] Same as pyrophorons. 
pyrophorous (pi-rof'6-rus), a. [< NL. pi/r<>- 
phor(us) + -o*.] Pertaining to or resembling 
pyrophorus. 
pyrophorus (pi-rof'o-rus), . [NL., < Gr. 
7ri'po0<ipof, fire-bearing: see pyrophorr.] 1. A 
substance which takes fire on exposure to air. 
Many metals (Iron, lead, etc.\ when exposed to the air In 
a very finely divided condition, combine so rapidly with 
oxygen as to cause an evolution of light. 
2. [<;>.] [NL. (Illiger, 1809).] A notable 
genus of elaterid beetles, comprising nearly 
a hundred species, con- 
fined to tropical and sub- 
tropical America, and con- 
taining the most brilliant 
forms of luminous insects. 
The light Is given out from 
two ovul spots in the pronotum 
near each nasal angle, and from 
a point beneath, oetween the 
thorax and the abdomen. These 
beetles tiy in a near!) <linrt Hue. 
and the light is more intense 
and sustained than that of the 
Lampttritljr. In many countries 
of tropical America they are 
used as toilet ornaments and 
form an article of trade. P. 
. . Is a large West I ndfun 
species oft< M iiiniitrht alive to (be Cnlted States. See 
also cut under antrttna. 
3. [;!.] A ifeiius of arachnidans. A'w/i. IKI17. 
pyrophosphate (pi-r<>-fos'fat), n. [< pym- 
pluipk(one) + -i/if 1 .] A salt of pvrophos 
plmrie aeiil. See i>itri'iiliin<i>li<irir. 
