fission 音标拼音: [f'ɪʃən]
n . 裂开,分裂,裂变
裂开,分裂,裂变
fission n 1 :
reproduction of some unicellular organisms by division of the cell into two more or less equal parts 2 :
a nuclear reaction in which a massive nucleus splits into smaller nuclei with the simultaneous release of energy [
synonym :
{
fission }, {
nuclear fission }]
Fission \
Fis "
sion \,
n . [
L .
fissio .
See {
Fissure }.]
1 .
A cleaving ,
splitting ,
or breaking up into parts .
[
1913 Webster ]
2 . (
Biol .)
A method of asexual reproduction among the lowest (
unicellular )
organisms by means of a process of self -
division ,
consisting of gradual division or cleavage of the into two parts ,
each of which then becomes a separate and independent organisms ;
as when a cell in an animal or plant ,
or its germ ,
undergoes a spontaneous division ,
and the parts again subdivide .
See {
Segmentation },
and {
Cell division },
under {
Division }.
[
1913 Webster ]
3 . (
Zool .)
A process by which certain coral polyps ,
echinoderms ,
annelids ,
etc .,
spontaneously subdivide ,
each individual thus forming two or more new ones .
See {
Strobilation }.
[
1913 Webster ]
4 . (
Physics )
The act or process of disintegration of an atomic nucleus into two or more smaller pieces ;
called also nuclear fission .
The process may be spontaneous or induced by capture of neutrons or other smaller nuclei ,
and usually proceeds with evolution of energy .
[
PJC ]
124 Moby Thesaurus words for "
fission ":
ablate ,
abscission ,
accelerate ,
activate ,
alpha decay ,
amputation ,
atom -
chipping ,
atom -
smashing ,
atomic disintegration ,
atomic reaction ,
atomization ,
atomize ,
beta decay ,
bifurcate ,
bisect ,
bombard ,
bombardment ,
branch ,
break into pieces ,
break to pieces ,
break up ,
breeding ,
bullet ,
butchering ,
by two ,
catalysis ,
catalyst ,
chain reaction ,
chopping ,
cleavage ,
cleave ,
come apart ,
consume ,
corrode ,
crack up ,
crash ,
cross -
bombard ,
crumble ,
crumble into dust ,
crunch ,
crush ,
cut in two ,
cut to pieces ,
cutting ,
decay ,
decompose ,
demolish ,
dialysis ,
dichotomize ,
dichotomy ,
diffuse ,
dimidiate ,
disintegrate ,
disintegration series ,
disjoin ,
disorganize ,
disperse ,
disrupt ,
dissociation ,
dissolve ,
divide ,
enucleation ,
erode ,
exchange reaction ,
excision ,
fall to pieces ,
fission reaction ,
fork ,
fragment ,
gamma decay ,
grind ,
halve ,
hydrolysis ,
hydrolyst ,
in half ,
ionization ,
laceration ,
make mincemeat of ,
mince ,
molder ,
mutilation ,
neutron reaction ,
nonreversible reaction ,
nuclear fission ,
nucleization ,
nucleize ,
photodisintegration ,
photolysis ,
proton gun ,
proton reaction ,
pulverize ,
ramify ,
rending ,
resection ,
reversible reaction ,
ripping ,
scatter ,
scission ,
section ,
severance ,
shatter ,
shiver ,
slashing ,
slicing ,
smash ,
smash the atom ,
smash up ,
splinter ,
split ,
split in two ,
splitting ,
splitting the atom ,
squash ,
squish ,
stimulation ,
subdivide ,
surgery ,
target ,
tearing ,
thermolysis ,
thermonuclear reaction ,
transect ,
waste away ,
wear away
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