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Barrier or
barrier in Wiktionary, the free dictionary. A
barrier or
barricade is a
physical structure which blocks or
impedes something.
Barrier may...
- A
mountain range or hill
range is a
series of
mountains or
hills arranged in a line and
connected by high ground. A
mountain system or
mountain belt is...
- The
Great Barrier Reef is the world's
largest coral reef system,
composed of over 2,900
individual reefs and 900
islands stretching for over 2,300 kilometres...
- The
Barrier is a lava dam
retaining the
Garibaldi Lake
system in
southwestern British Columbia, Canada. It is over 300 m (980 ft)
thick and
about 2.4 km...
- A
barrier cream is a
topical formulation used in
industrial applications and as a
cosmetic to
place a
physical barrier between the skin and contaminants...
-
Switching barriers or
switching costs are
terms used in microeconomics,
strategic management, and marketing. They may be
defined as the
disadvantages or...
- vasectomy,
tubal ligation,
periodic abstinence, IUDs and
multiple non-
barrier methods of
pregnancy prevention. However, condoms, when used correctly...
- The blood–brain
barrier (BBB) is a
highly selective semipermeable border of
endothelial cells that
regulates the
transfer of
solutes and
chemicals between...
-
diffusion barrier is a thin
layer (usually
micrometres thick) of
metal usually placed between two
other metals. It is done to act as a
barrier to protect...
- In physics,
quantum tunnelling,
barrier penetration, or
simply tunnelling is a
quantum mechanical phenomenon in
which an
object such as an
electron or...
