Metaphloém 
Microdiodange 
Metaphlo’ém( + PHLoim), Van Tieg- 
hem’s term for a simultaneous 
growth of bast - tissue with the 
METAXYLEM; Metaphy’ta (gu7ov, 
a plant), (1) plants which mani- 
fest sexuality or indicate by ac- 
cessory characters that in their 
ancestral lines sexually complete 
progenitors have occurred; (2) 
plants with tissue differentiation ; 
cf. PRoTorHyTE, adj. metaphy’tic ; 
Met’‘aplasm (mAdcua, moulded), 
Hanstein’s term for the proto- 
plasm which contains the forma- 
tive or granular material; Met- 
aplas’tid, used to designate the 
metaphytic organism (Moore) ; 
Met’asperm (o7répua, seed), (1) a 
sporophyte in which the egg-orgap 
is aborted, and no purely vegeta- 
tive cells are to be found in either 
male or female plants ; (2) a syno- 
nym for Angiosperms ; (3) applied 
by Boulger for the large-celled 
secondary prothallium in Sela- 
ginella, the secondary endosperm 
in Gymnosperms, and the endo- 
sperm, originally so-called, formed 
after fertilisation by the division 
of the secondary nucleus of the 
embryo-sac in Angiosperms ; 
metaspermic, metasper’mous, 
angiospermous ; Metaspor’ophyte, 
Macmillan’s expression for a Cryp- 
togam of the highest specialisation, 
as Selaginella. 
Metas’tasis (uerdoracts, a removing), 
(1)the sum of the changes undergone 
by the products of assimilation in 
the cells; metabolism; (2) the 
shifting of an organ to some usual 
position (Moquin-Tandon). 
Metax’in (ueratv, between), a proteid, 
the material of the fibrils of plastids, 
Metaxy’lem (werd, beyond, + XYLEM), 
the centrifugally formed vascular 
bundles superposed to the liber 
bundles (Van Tieghem). 
meteor’ic (Mod. peréwpos, in mid air), 
applied to flowers whose expansion 
depends upon the weather. 
metis’toid (771s, counsel, efdos, like), 
composed of differentiated cells, 
each eell being dependent on the 
other cells of the organism (Hartog). 
metoe’cious (pera, beyond, olkos, 
house), existing on different hosts, 
heteroecious ; metox’enous (tévos, 
a host) is a synonym. 
Metrogonid’ium (ujrnp, mother, + 
Gon1pIuM)= Hererocyst. 
Mette’nian Glands, organs peculiar 
to Plumbagineae which secrete 
mucilage and sometimes chalk, 
Me’tuloids (metula, a small pyramid, 
eldos, like), modified cystidia, en- 
crusted with lime, which project 
from the hymenium of Peniophora, 
giving it a velvety appearance. 
Miasm’, Mias’ma (ulacua, defilement), 
Naegeli’s term for those diseases 
which are due to microbes. 
Micel’la (L. Lat. from mica, a crumb), 
an aggregation of molecules in the 
manner of a pleon, but in larger 
numbers (Nageli); micel’lar Ag’gre- 
gate, a combination of Micellae. 
Micran’dre (uixpos, small, dvyp, dvdpos, 
aman)=DWARF-MALE; micro-aéro- 
ph'ilous (dip, air, giAéw, I love) Bei- 
jerinck’s term foranaérobic, needing 
but little free oxygen ; Microb’asis 
(Bdors, a base), a variety of the car- 
cerule, as in Labiates ; Mi’crobe, pl. 
Micro'bia (Bros, life), Pasteur’s term 
forsuchorganismsasSchizomycetes, 
bacteria ; adj. microbio’tic ; Micro- 
cen’trum (centrum, xévrpov, a sharp 
point), applied to the granular 
inclusions in the astrosphere of 
leucocytes, probably the equiva- 
lent of Centrosome (Farmer) ; 
Micrococe’cus, pl. Microcoe’ci (xékxos, 
a kernel), a genus of bacteria, 
sometimes used to express mi- 
crobiotic organisms; Microcon’id, 
Microconid'ium (+Conrpium), the 
smaller conidia, when two sizes 
are produced ; Mi’crocyst («éoris, a 
bag), an amoeboid cell which is sur- 
rounded by a membrane, the rest- 
ing state of swarm-cells of Myxo- 
gastres; Mi’croderm (dépya, skin), 
= Micrope; Microdi/odange (+ 
Diopz, dyyefov, a vessel), Wan 
Tieghem’s term for pollen-sac ; 
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