calliper


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calliper 

A device used to measure distances between structures or surfaces. It usually comprises a scale at one end, while at the other end are two legs, which can be adjusted to the appropriate measurement. Example: lens thickness caliper.
References in periodicals archive ?
"As far back as I can remember all my toys had callipers," she says.
"The other children just accepted me - I was known as `the girl with callipers'."
Philippa was occasionally allowed to take off her callipers - "I really loved that sense of freedom," she says.
First I had to take off the callipers. Things had to be planned."
At nine, Philippa was told she would have to wear callipers for another six years.