a chemical with a sour taste that forms a salt when mixed witha base acid rain is very bad.
aspect
a part
The book has many different aspects available for discussion.
aspirin
a medicine that reduces pain and fever
People use aspirin today to help with pain and fever.
bark
the outer covering of a tree
Tom, however, looked for some pieces of bark and wrote on them.
calculator
a small electronic device used for adding, subtracting, etc.
Use a calculator to add all those numbers.
characteristically
usually; typically
He replied in characteristically robust style.
chemistry
the way substances change and react with other substances
In chemistry class, the professor taught us about chemical reactions.
classify
to place into a certain group; to categorize
We can classify plants by different things we know about them.
composition
the combination of parts or elements that make up something
This composition needs to be written again.
crude
simple and basic in a way that is true but not complete
She drew crude hearts on the ground to show how much she loved him.
density
the amount of matter in something that is shown by the relationship between its weight and its size
The density of a bowling ball is higher than a basketball.
diagnose
to recognize a disease or other health condition in someone
The doctor was able to diagnose the man's illness.
estimate
to guess
It is estimated that over 98% of people in Korea are literate.
formula
in math, a general fact or rule expressed in letters and numbers
I’m not good at learning formulas.
gauge
to measure or judge
He gauged strength of the wind.
Hippocrates
a Greek doctor who started the study of medicine
Some early doctors, notably hippocrates, thought that diet was important.
method
a way of doing something
Everyone has a different method of doing their studies efficiently.
physiological
of or relating to how a living thing or its parts function
The physiological reports show that his body is functioning normally.
plug into
to put information (such as a word or a number) into something
The VCR plugs into the back of the television.
precise
very accurate and exact
He gave me precise directions to his house.
productivity
the rate at which work is completed
They say sleeping on the job helps increase productivity.
severe
strong; very bad
The flooding is severe after a strong hurricane.
squeeze
to press together the parts and especially the opposite sides of something
Will you squeeze that tube of paste and see if there is any left?
stimulus (pl. stimuli)
something that causes a change or a reaction
Being bullied at school was the stimulus that prompted me to start self-defense classes.
tension
stress
Then there was a heavy bang against the basement door and a long silence of tension and terror!
thickness
a measurement of how thick something is
Use wood of at least 15mm thickness.
trigger
to cause to begin
The warm temperatures triggered the break up of the ice.
tumor
a mass of tissue in or on the body that is made of abnormal cells
Doctors recently discovered a cancerous tumor in the woman's brain.
vomit
to empty the contents of one's stomach through the mouth; to throw up
When some people are very sick, they vomit.
willow tree
a tree with long, narrow leaves and strong, thin branches
The willow tree in the story also has symbolic meaning.
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