an improvement
Scientific advances is what enabled the doctors to find a cure for their mother's illness.
civilian
someone who is not a member of the military or police forces
After serving in the military for 25 years, he was a civilian again.
concentration
total attention to something
One of his difficulties in school was that he lacked concentration.
contamination
to spoil the purity of something or make it poisonous
After the oil spill, the lake had to be checked for contamination.
disaster
a sudden great act of destruction and loss
Earthquakes, tsunamis and typhoons are considered natural disasters.
exceed
to be more than
The donations from the church far exceeds what they were hoping for.
facility
the physical area
The apartment complex had a nice recreational facility including a weight room and indoor swimming pools.
inability
lack of power or capacity to do something
Harold was never able to get married because of his inability to commit to a relationship.
inadequate
not enough
The mother's supply of milk was inadequate, so the doctors recommended supplementing with formula.
material
any physical substance, such as rock, wood, glass, plastic, etc
Many kitchen utensils are now made from plastic material.
meltdown
the melting down of uranium rods and safety walls, releasing nuclear radiation
The reactor lost its coolant causing a nuclear meltdown.
misconception
misunderstanding
The bride had the misconception that the wedding was going to be paid by the groom's family.
neutron
a part of an atom that has no electrical charge
The neutron and proton make up the nucleus of an atom.
nuclear fission
the splitting of the nucleus of an atom, which results in the release of a large amount of energy nuclear fission resulted in the development of atomic bombs which were dropped in Hiroshima and Nagasaki.
perception
the way a person sees something
My perception of the meeting was very different than yours.
threshold
the level or point at which you start to experience something, or at which something starts to happen
I have a high threshold for pain.
tragedy
a sad event
The death of their son was a tragedy that affected the entire neighborhood.
turbine
a machine that produces power by turning blades with steam, water, or gas, especially to create electricity
A turbine is a rotary engine that extracts energy from a fluid flow.
uncontrolled
not controlled
The son's spending was uncontrolled, and he had to file for bankruptcy.
waste
to make poor use of something valuable
The students wasted the scratch paper by only using one side of it.
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