Longman Dictionary of Contemporary English homepage

seismograph

noun
     
Related topics: Geology, Measurement
seis‧mo‧graph [countable]
HEGTM an instrument that measures and records the movement of the earth during an earthquake

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary