barrier

(redirected from Blood-testis barrier)
Also found in: Thesaurus, Medical, Legal, Financial, Encyclopedia, Wikipedia.

bar·ri·er

 (băr′ē-ər)
n.
1. A material formation or structure, such as a mountain range or wall, that prevents passage or access.
2. Something immaterial that obstructs or impedes: Lack of education can be a barrier to success.
3. Physiology A membrane, tissue, or mechanism that blocks the passage of certain substances.
4. Ecology A physical or biological factor that limits the migration, interbreeding, or free movement of individuals or populations.
5. A movable gate that keeps racehorses in line before the start of a race.
6. often barriers The palisades or fences enclosing the lists of a medieval tournament.
7. Geology An ice barrier.

[Middle English barrer, from Old French barriere, from Vulgar Latin *barrāria, from *barra, bar.]

barrier

(ˈbærɪə)
n
1. anything serving to obstruct passage or to maintain separation, such as a fence or gate
2. anything that prevents or obstructs passage, access, or progress: a barrier of distrust.
3. anything that separates or hinders union: a language barrier.
4. (Physical Geography)
a. an exposed offshore sand bar separated from the shore by a lagoon
b. (as modifier): a barrier beach.
5. (Physical Geography) (sometimes capital) that part of the Antarctic icecap extending over the sea
[C14: from Old French barriere, from barre bar1]

bar•ri•er

(ˈbær i ər)

n.
1. anything built or serving to bar passage, as a railing, fence, or the like.
2. any natural bar or obstacle: a mountain barrier.
3. anything that obstructs progress, access, etc.: trade barriers.
4. a limit or boundary of any kind: the barriers of caste.
5. an antarctic ice shelf or its front.
6. barriers, the palisade or railing surrounding the ground where medieval tournaments and jousts were held.
[1275–1325; Middle English < Middle French barriere <barre bar1]

barrier

A coordinated series of obstacles designed or employed to channel, direct, restrict, delay, or stop the movement of an opposing force and to impose additional losses in personnel, time, and equipment on the opposing force. Barriers can exist naturally, be manmade, or a combination of both.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.barrier - a structure or object that impedes free movementbarrier - a structure or object that impedes free movement
balusters, balustrade, banister, handrail, bannister - a railing at the side of a staircase or balcony to prevent people from falling
barricade - a barrier (usually thrown up hastily) to impede the advance of an enemy; "they stormed the barricade"
breakwater, groyne, jetty, seawall, bulwark, groin, mole - a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
bulwark - a fencelike structure around a deck (usually plural)
crash barrier - a strong protective barrier that is erected around a racetrack or in the middle of a dual-lane highway in order to reduce the likelihood of severe accidents
dam, dike, dyke - a barrier constructed to contain the flow of water or to keep out the sea
fence, fencing - a barrier that serves to enclose an area
fender, wing - a barrier that surrounds the wheels of a vehicle to block splashing water or mud; "in Britain they call a fender a wing"
grating, grate - a barrier that has parallel or crossed bars blocking a passage but admitting air
hurdle - a light movable barrier that competitors must leap over in certain races
movable barrier - a barrier that can be moved to allow passage
impedimenta, obstruction, obstructor, obstructer, impediment - any structure that makes progress difficult
rail, railing - a barrier consisting of a horizontal bar and supports
revetment - a barrier against explosives
barricade, roadblock - a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc.
starting gate, starting stall - a movable barrier on the starting line of a race course
2.barrier - any condition that makes it difficult to make progress or to achieve an objectivebarrier - any condition that makes it difficult to make progress or to achieve an objective; "intolerance is a barrier to understanding"
obstacle, obstruction - something immaterial that stands in the way and must be circumvented or surmounted; "lack of imagination is an obstacle to one's advancement"; "the poverty of a district is an obstacle to good education"; "the filibuster was a major obstruction to the success of their plan"
ideological barrier - a barrier to cooperation or interaction resulting from conflicting ideologies
language barrier - barrier to communication resulting from speaking different languages
3.barrier - anything serving to maintain separation by obstructing vision or accessbarrier - anything serving to maintain separation by obstructing vision or access
bar - a submerged (or partly submerged) ridge in a river or along a shore; "the boat ran aground on a submerged bar in the river"
blood-brain barrier - a mechanism that creates a barrier between brain tissues and circulating blood; serves to protect the central nervous system; "the brain was protected from the large molecules of the virus by the blood-brain barrier"
curtain - any barrier to communication or vision; "a curtain of secrecy"; "a curtain of trees"
mechanism - a natural object resembling a machine in structure or function; "the mechanism of the ear"; "the mechanism of infection"

barrier

noun
1. obstacle, bar, block, handicap, hurdle, limitation, hitch, drawback, snag, obstruction, stumbling block, impediment, hindrance Duties and taxes are the most obvious barriers to free trade.
2. barricade, wall, bar, block, railing, fence, pale, boundary, obstacle, ditch, blockade, obstruction, rampart, bulwark, palisade, stockade The demonstrators broke through the heavy police barriers.

barrier

noun
1. A solid structure that encloses an area or separates one area from another:
2. Something that impedes or prevents entry or passage:
Translations
حَاجِزحاجِزعائِق
bariérapřekážkazábranazávora
afspærringbarrierebarrikadehindring
este
prepreka
hindrun, fyrirstaîahindrun, tálmi
장벽
barjerakavēklisnožogojumsšķērslis
bariéra
pregradazapora
barriär
สิ่งกีดขวาง
chướng ngại

barrier

[ˈbærɪəʳ]
A. Nbarrera f, valla f (Rail) (in station) → barrera f; (= crash barrier) → valla f protectora (fig) → barrera f, obstáculo m (to para)
B. CPD barrier cream Ncrema f protectora
barrier method Nmétodo m (de) barrera

barrier

[ˈbæriər] n
(= wall) → barrière f
(= obstacle) a barrier to sth [+ progress, communication] → un obstacle à qch language barrier, trade barriers
(British) (on road) (also crash barrier) → glissière f de sécurité, rail m de sécurité
(at train station)portillon mbarrier cream n (British)crème f protectricebarrier method nméthode f de contraception locale

barrier

n
(natural) → Barriere f; (man-made, erected also) → Sperre f; (= railing etc)Schranke f; (= crash barrier)(Leit)planke f
(fig: = obstacle) → Hindernis nt, → Barriere f(to für); (of class, background, education, between people)Schranke f, → Barriere f; trade barriersHandelsschranken pl; barrier of language, language barrierSprachbarriere f; a barrier to success/progress etcein Hindernis für den Erfolg/Fortschritt etc; because of the barrier of her shynessaufgrund or auf Grund ihrer Schüchternheit, die ein Hemmnis ist/war etc; to put up/break down barriersZäune errichten/niederreißen

barrier

:
barrier contraceptive
barrier-free
barrier cream
nHaut(schutz)creme f
barrier reef
nBarriere-, Wallriff nt; the Great Barrier Reefdas Große Barriereriff

barrier

[ˈbærɪəʳ] nbarriera (Brit) (also crash barrier) → guardrail m inv (Rail) (in station) → cancello (fig) → barriera, ostacolo

barrier

(ˈbӕriə) noun
1. something put up as a defence or protection. a barrier between the playground and the busy road.
2. something that causes difficulty. His deafness was a barrier to promotion.

barrier

حَاجِز bariéra barriere Schranke εμπόδιο barrera este barrière prepreka barriera 장벽 barrière barriere bariera barreira препятствие barriär สิ่งกีดขวาง bariyer chướng ngại 障碍

bar·ri·er

n. obstrucción, barrera.

barrier

n barrera; placental — barrera placentaria
References in periodicals archive ?
Cadmium chloride does not cause significant damages in the testes at a low dose of less than 3 mg/kg; however, it induces mild apoptosis of germ cells and damage to blood-testis barrier (BTB) (12, 13).
Sertolin mediates blood-testis barrier restructuring," Endocrinology 155(4); 1520-1531.
Furthermore, according to some Studies, usage of antioxidants and vitamin B,E and C can lower infertility through reducing damages caused by free radicals, sperms DNA regeneration and preservation, and through strengthening blood-testis barrier [2,8,26].
The blood-testis barrier is a physical barrier between the blood vessels and the seminiferous tubules of the testes (the organs in which sperm originate).
Orchiectomy not only provides histologic tissue for diagnosis but also removes a potential sanctuary site, as the blood-testis barrier makes testicular tumors inaccessible to systemic therapy.
Elsewhere, Cd was also found to lead to the disruption of the blood-testis barrier (Chung and Cheng 2001; Wong et al.
The blood-testis barrier forms an impermeable lining around the inside of the tubule and protects vulnerable growing sperm from infections, toxins and immune system cells.
Demonstration of a functional blood-testis barrier to acetaldehyde.