IRR- 
apsceperaind Ani gd n. [L.irritare, 
0 provoke. ] 
ae ahs acroniaes. or stimuli, an 
reacting to them, inherent in living 
matter (phys.). 
irritant (iritant) 7. [L. zr tare, to 
external stimulus 
which provokes a response ( — 
ischiadic (is kidd’ k) a Ischia 
ischial (is’ki ape [Gk. aang a hip.] 
yom of the hip; 
appl. eae eh (anat.). 
ischiocapsular (is’ Koka p" sular) 
[Gk. zschion, pe 3 L. capsula, — 
chest. ] a ligament joi 
st.] Appi. 
the —— ligament and the hi ip 
= 
hiocavernous apr a. 
“Gk, a ‘on, hip; L.c 
Appl. 
hiopodite (is’kidp’ dit) w. . 1Gk. 
peep hip ; ; pous, foot The 
pro in joint of the walking legs 
of certain Crustacea, or of th 
Neatip des (zoo/.). 
a Ry ieee k) [Gk 
ischion, hip ; L. pubis, adult.} Appi. 
g enestra between the 
p 
ischium and pubis (amaz.), 
(iskiépi’bis) 2. [Gk. 
ischiopubis 
tschion, hip; L. pudé ult.] Th 
ischium of Pterodactyls, the pubis 
lum ; a fused ischium and pu 
(zool.). 
ischi 
Cilia gels ee | 
ischion, : rectus, straight.] 
Per ium a rec ie 
fossa and muscles (a4 
ischium (is‘kitim ischion, 
bone of each half o _ the v 
er of Mammals ; an ischiopodite 
isditerous (7 ennrgs a. [Gk. z. 
plan te Ps rre, to bear.] Bening 
Padia ( 
isidioid (sido) [Gk. zsds, FPR 
eidos, like.] Like an isidium (bot. 
isidium "Gsid'tim) m., isidia (isid’ia) 
plu. [Gk. zsis, plant. 
soredia on — surface of some 
Lichens (40 
isidophorous “i siddf‘ériis) @. [Gk. 
isis, a pints pherein, to bear.] Isid- 
ifer 
157 
ISO- 
islets of Langerhans,—spherical or 
oval bodies 4 scattered throughout 
the pancreas, concerned in the 
metabolism of sugar in the body 
LYS. )s 
isobilateral symmetry,—the quality 
of leaves whose and lower 
ot.) 
isocarpous (i’sékar'piis) a. [Gk. zsos, 
e ; Having car- 
0 = 
a. _[Gk. Zsos 
equal ; serkos, tail] With verte- 
bral column ee 2 in median line 
of caudal fin (z00 
isochela . sikeli) {Gk zsos, equal; 
chele, WA Ae with two 
parts peli; Ge —— is) 
isocytic (Isésit'ik) a. [Gk. zsos, equal; 
1 os, hollow. ] With all ose equal 
bi 
sodactyl aut sddak'tiliis) a. [Gk. 
7508, equal; d aktylos, finger.] _Hay- 
made digits of equal size 
ateaneene (isédiamét’'rik) a. [Gk. 
isos, equal; dia, through ; metron, 
re.] ith cells or othe 
. 
t. 
os, equal; 
all 
0 
equal (zoo/.). 
ir qual gametes, not 
differentiated from one another. 
dg’Amiis) a, [Gk. tS08, 
; gamos, marriage] Having 
the pa alike (40 
isogamy (isdg’Ami) “8 [Gk.  zsos, 
equal; gamos, union.] Sexual 
rr. or union of similar gametes 
(diol. 
isogenetic (s6jénétik) a. [Gk. zsos, 
ual ; mpee offspring.] Arising 
ee t ame or a similar origin 
(dtol.). 
isogenous (iséj‘éntis) a. Isogenetic. 
isognathous (isdg’nathiis) a. [ 
isos, equal; ig _ jaw.] Having 
gol. 
mast: (7 sémis ‘tigot) @ [Gk. 
isos, equal; mastix, whip.] Having 
