MID- 
mid-rib,—the large central vein of a 
leaf, the continuation of the petiole 
— 
ff (m id’rif) #. [A.S. ot 
Mary , the belly. g The diaphragm or 
scular partition between the 
Soar and abdominal cavities 
(anat., zool.). 
Miescher’ s tubes,— see Rainey’s 
ubes. 
weiacarion (migra’shiin) [L. 
are, to transfer.] Change of 
food-supply, o 
birds, also in ade 
fishes, ae a 
tory i1,—an —— cell or 
leucocyte oF the 
(mil'iari) me TL. milium, 
millet. ] Of granular = sia 
small and numerous (zo0/.). 
milk-teeth,—the first dentition of 
— shed soon after or before 
er, bats, certain 
mit co) <i [A.S. mzlze, the spleen.] 
rit Poe rg [A corruption of milk, 
to confusion with milt, the 
Seen) The soft roe, or male 
generative or Fishes. 
mimetic (mimét'ik) a. [Gk. mim 
tkos, imitative.] Appl. cnet 
and plants which practise mimicry 
(dt0l.). 
mimic (mim'ik) v. mimikos, 
imitatin To assume, Siaalty for 
protection, the habits, c colour, or 
structure of another organism 
ool. 
mimicry (mim’ikri) #. [Gk. — 
imitative.] Assumption of resem 
lance in colour or structure as a 
means of self-protection oo 
mine (min to con- 
C nel or gallery con- 
structed mS an ‘insect (zool. 
minimus fm sgh 
least. ] The fifth digit of hand o 
oot. 
aripeus (mi’ésén [Gk. meion, 
less ; £ainos, adios, Appl. the 
f thirteen rock- 
ystems elongin g to the 
seit or Tertiary — (pal.). 
miostemo ostemonous 
(404.). 
miracidium (mir‘Asid'itim) 2. [Gk. 
193 
MIX- 
dim. of metrakion, . purples) 
The ciliated embryo or youngest 
stage in the life-history “of a Trema- 
tode (zool.). 
‘ttaéicniirin (mi'ték6n’dria) 2, plu. 
[Gk. mitos, thread ; chondros, grain.] 
Ergastoplasmic ’granulations of 
granules or fibrils near the nucleus 
of pancreas cells (anat 
mitochondrial sheath,—an envelope 
containing mitochondrial granules 
sheathing the spiral thread of a 
Soene en body or connecting 
ce 
mitome (mitém) #7 [Gk. miifos, 
thread. ] The reticulum of cell- 
pro er as opposed to ground- 
substance (dzo/.). 
toschisis Conti ‘kisis) Gk. 
mitos, thread ; schizein, to ‘cleave. 
Indirect nuclear division ; mitosis 
cyt.). 
mitosis (mitd’sis) ~ [Gk. mifos, 
thread. ndirect or karyokinetic 
nuclear division, with chromosome- 
formation, spin ndle-formati 
with or without centrosome activity, 
a na amity of the chromo- 
somes 
cmtanea: “a i nm, [Gk. mitos, 
bo A bod 
m the spindle- -fibres of 
Scot 
e 
figure, 
[L. mztra, head- 
: c 
appl. division, 
e eee 
pileus of certain hes 
tral cells,—pyramidal cule with 
thick basal dendeitin: found in the 
maeenageone layer of the olfactory 
bulb (4 
mitral parser # bicuspid valve, 
green te left ogee 
bem orifice of the heart (ava 
poy ‘riférm) a. [L. mitre 
d; forma, shape.] Mitre 
pick earousars (mik’siptérij’‘iiim) 7. 
N 
