bacteria 音標拼音: [bækt'ɪriə]
n . 細菌
細菌
bacteria n 1 : (
microbiology )
single -
celled or noncellular spherical or spiral or rod -
shaped organisms lacking chlorophyll that reproduce by fission ;
important as pathogens and for biochemical properties ;
taxonomy is difficult ;
often considered to be plants [
synonym : {
bacteria }, {
bacterium }]
Bacteria \
Bac *
te "
ri *
a \,
n .
pl .
See {
Bacterium }.
[
1913 Webster ]
Bacterium \
Bac *
te "
ri *
um \ (
b [
a ^]
k *
t [=
e ]"
r [
i ^]*[
u ^]
m ),
n .;
pl .
{
Bacteria } (
b [
a ^]
k *
t [=
e ]"
r [
i ^]*[.
a ]). [
NL .,
fr .
Gr .
bakth `
rion ,
ba `
ktron ,
a staff :
cf .
F .
bact ['
e ]
rie .] (
Biol .)
A microscopic single -
celled organism having no distinguishable nucleus ,
belonging to the kingdom Monera .
Bacteria have varying shapes ,
usually taking the form of a jointed rodlike filament ,
or a small sphere ,
but also in certain cases having a branched form .
Bacteria are destitute of chlorophyll ,
but in those members of the phylum Cyanophyta (
the blue -
green algae )
other light -
absorbing pigments are present .
They are the smallest of microscopic organisms which have their own metabolic processes carried on within cell membranes ,
viruses being smaller but not capable of living freely .
The bacteria are very widely diffused in nature ,
and multiply with marvelous rapidity ,
both by fission and by spores .
Bacteria may require oxygen for their energy -
producing metabolism ,
and these are called {
aerobes };
or may multiply in the absence of oxygen ,
these forms being {
anaerobes }.
Certain species are active agents in fermentation ,
while others appear to be the cause of certain infectious diseases .
The branch of science with studies bacteria is {
bacteriology },
being a division of {
microbiology }.
See {
Bacillus }.
[
1913 Webster PJC ]
56 Moby Thesaurus words for "
bacteria ":
Euglena ,
adenovirus ,
aerobe ,
aerobic bacteria ,
amoeba ,
anaerobe ,
anaerobic bacteria ,
animalcule ,
bacillus ,
bacterium ,
bug ,
coccus ,
colon bacillus ,
diatom ,
disease -
producing microorganism ,
dyad ,
echovirus ,
enterovirus ,
filterable virus ,
flagellate ,
fungus ,
germ ,
gram -
negative bacteria ,
gram -
positive bacteria ,
microbe ,
microorganism ,
microspore ,
microzoa ,
mold ,
monad ,
nematode ,
nonfilterable virus ,
paramecium ,
pathogen ,
picornavirus ,
protozoa ,
protozoon ,
reovirus ,
rhinovirus ,
rickettsia ,
salmonella ,
saprophyte ,
spirillum ,
spirochete ,
spore ,
sporozoon ,
staphylococcus ,
streptococcus ,
tetrad ,
triad ,
trypanosome ,
vibrio ,
virus ,
volvox ,
vorticellum ,
zoospore
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