reef 音标拼音: [r'if]
n . 暗礁,礁,缩帆
vt .
vi . 缩(帆)
暗礁,礁,缩帆缩(帆)
reef n 1 :
a submerged ridge of rock or coral near the surface of the water 2 :
a rocky region in the southern Transvaal in northeastern South Africa ;
contains rich gold deposits and coal and manganese [
synonym : {
Witwatersrand }, {
Rand }, {
Reef }]
3 :
one of several strips across a sail that can be taken in or rolled up to lessen the area of the sail that is exposed to the wind v 1 :
lower and bring partially inboard ; "
reef the sailboat '
s mast "
2 :
roll up (
a portion of a sail )
in order to reduce its area 3 :
reduce (
a sail )
by taking in a reef Reef \
Reef \,
n . [
Akin to D .
reef ,
G .
reff ,
Sw .
ref ;
cf .
Icel .
rif reef ,
rifa to basten together .
Cf . {
Reeve },
v .
t .,
{
River }.] (
Naut .)
That part of a sail which is taken in or let out by means of the reef points ,
in order to adapt the size of the sail to the force of the wind .
[
1913 Webster ]
Note :
From the head to the first reef -
band ,
in square sails ,
is termed the first reef ;
from this to the next is the second reef ;
and so on .
In fore -
and -
aft sails ,
which reef on the foot ,
the first reef is the lowest part .
--
Totten .
[
1913 Webster ]
{
Close reef },
the last reef that can be put in .
{
Reef band }.
See {
Reef -
band }
in the Vocabulary .
{
Reef knot },
the knot which is used in tying reef pointss .
See Illust .
under {
Knot }.
{
Reef line },
a small rope formerly used to reef the courses by being passed spirally round the yard and through the holes of the reef . --
Totten .
{
Reef points },
pieces of small rope passing through the eyelet holes of a reef -
band ,
and used reefing the sail .
{
Reef tackle },
a tackle by which the reef cringles ,
or rings ,
of a sail are hauled up to the yard for reefing . --
Totten .
{
To take a reef in },
to reduce the size of (
a sail )
by folding or rolling up a reef ,
and lashing it to the spar .
[
1913 Webster ]
Reef \
Reef \ (
r [=
e ]
f ),
n . [
Akin to D .
rif ,
G .
riff ,
Icel .
rif ,
Dan .
rev ;
cf .
Icel .
rifa rift ,
rent ,
fissure ,
rifa to rive ,
bear .
Cf . {
Rift }, {
Rive }.]
1 .
A chain or range of rocks lying at or near the surface of the water .
See {
Coral reefs },
under {
Coral }.
[
1913 Webster ]
2 . (
Mining .)
A large vein of auriferous quartz ; --
so called in Australia .
Hence ,
any body of rock yielding valuable ore .
[
1913 Webster ]
{
Reef builder } (
Zool .),
any stony coral which contributes material to the formation of coral reefs .
{
Reef heron } (
Zool .),
any heron of the genus {
Demigretta };
as ,
the blue reef heron ({
Demigretta jugularis })
of Australia .
[
1913 Webster ]
Reef \
Reef \,
v .
t . [
imp . &
p .
p . {
Reefed } (
r [=
e ]
ft );
p .
pr . &
vb .
n . {
Reefing }.] (
Naut .)
To reduce the extent of (
as a sail )
by rolling or folding a certain portion of it and making it fast to the yard or spar .
--
Totten .
[
1913 Webster ]
{
To reef the paddles },
to move the floats of a paddle wheel toward its center so that they will not dip so deeply .
[
1913 Webster ]
123 Moby Thesaurus words for "
reef ":
ait ,
archipelago ,
arrest ,
atoll ,
backpedal ,
backwater ,
bank ,
bar ,
bill ,
brake ,
breakwater ,
cape ,
cay ,
check ,
chersonese ,
clear the decks ,
clip the wings ,
consider every angle ,
continental island ,
coral head ,
coral heads ,
coral island ,
coral reef ,
curb ,
decelerate ,
delay ,
delta ,
detain ,
dowse sail ,
draw rein ,
ease off ,
ease up ,
flat ,
ford ,
forearm ,
foreland ,
furl ,
guard against ,
hand a sail ,
head ,
headland ,
hedge ,
hold back ,
hold in check ,
hold up ,
holm ,
hook ,
impede ,
insularity ,
ironbound coast ,
island ,
island group ,
islandology ,
isle ,
islet ,
keep back ,
key ,
leave out nothing ,
ledges ,
lee shore ,
let down ,
let up ,
lose ground ,
lose momentum ,
lose speed ,
make sure ,
make sure against ,
moderate ,
mull ,
naze ,
ness ,
obstruct ,
oceanic island ,
overlook no possibility ,
peninsula ,
pitfall ,
play safe ,
point ,
prepare for ,
promontory ,
provide a hedge ,
provide against ,
provide for ,
quicksands ,
reduce sail ,
reef down ,
rein in ,
relax ,
retard ,
rockbound coast ,
rocks ,
sandbank ,
sandbar ,
sands ,
sandspit ,
set back ,
shallow ,
shallows ,
shelf ,
shoal ,
shoal water ,
shoals ,
shorten sail ,
slack off ,
slack up ,
slacken ,
slow ,
slow down ,
slow up ,
snug down ,
spit ,
spur ,
stay ,
take in sail ,
take measures ,
take precautions ,
take steps ,
throttle down ,
tidal flats ,
tongue ,
undercurrent ,
undertow ,
wetlands
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Reef - Wikipedia A reef is a ridge or shoal of rock, coral, or similar relatively stable material lying beneath the surface of a natural body of water [1] Many reefs result from natural, abiotic (non-living) processes such as deposition of sand or wave erosion planing down rock outcrops
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Coral reef - Wikipedia Usually, three major zones are recognized: the fore reef, the reef crest, and the back reef (also called the reef lagoon) The three zones are physically and ecologically interconnected
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Coral reef | Description, Geochemistry, Origins, Threats | Britannica Coral reef, ridge or hummock formed in shallow ocean areas by algae and the calcareous skeletons of coral polyps and other coelenterates A coral reef may grow into a permanent coral island Often called ‘rainforests of the sea,’ coral reefs are home to a spectacular variety of organisms
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