stratum 音標拼音: [str'ætəm]
n . 地層,階層
地層,階層
stratum 層
stratum 層
stratum n 1 :
one of several parallel layers of material arranged one on top of another (
such as a layer of tissue or cells in an organism or a layer of sedimentary rock )
2 :
people having the same social ,
economic ,
or educational status ; "
the working class "; "
an emerging professional class "
[
synonym : {
class }, {
stratum }, {
social class }, {
socio -
economic class }]
3 :
an abstract place usually conceived as having depth ; "
a good actor communicates on several levels "; "
a simile has at least two layers of meaning "; "
the mind functions on many strata simultaneously " [
synonym : {
level }, {
layer }, {
stratum }]
Stratum \
Stra "
tum \,
n .;
pl .
E . {
Stratums },
L . {
Strata }.
The latter is more common . [
L .,
from sternere ,
stratum ,
to spread ;
akin to Gr . ?
to spread ,
strew .
See {
Strew },
and cf .
{
Consternation }, {
Estrade }, {
Prostrate }, {
Stratus },
{
Street }.]
1 . (
Geol .)
A bed of earth or rock of one kind ,
formed by natural causes ,
and consisting usually of a series of layers ,
which form a rock as it lies between beds of other kinds .
Also used figuratively .
[
1913 Webster ]
2 .
A bed or layer artificially made ;
a course .
[
1913 Webster ]
83 Moby Thesaurus words for "
stratum ":
Appleton layer ,
F layer ,
Heaviside -
Kennelly layer ,
Van Allen belt ,
band ,
bed ,
bedding ,
belt ,
blood ,
bracket ,
branch ,
caste ,
category ,
chemosphere ,
clan ,
class ,
couche ,
course ,
deck ,
division ,
estate ,
floor ,
gallery ,
grade ,
group ,
grouping ,
head ,
heading ,
ionosphere ,
isothermal region ,
kin ,
label ,
layer ,
ledge ,
level ,
lower atmosphere ,
measures ,
order ,
outer atmosphere ,
overlayer ,
overstory ,
photosphere ,
pigeonhole ,
plane ,
position ,
predicament ,
race ,
rank ,
rating ,
rubric ,
seam ,
section ,
sept ,
set ,
shelf ,
stage ,
standing ,
station ,
status ,
step ,
story ,
strain ,
stratification ,
stratosphere ,
subdivision ,
subgroup ,
suborder ,
substratosphere ,
substratum ,
superstratum ,
table ,
thickness ,
tier ,
title ,
topsoil ,
tropopause ,
troposphere ,
underlayer ,
understory ,
understratum ,
upper atmosphere ,
vein ,
zone
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