Longman Dictionary of Contemporary English homepage

Date: 1200-1300
Origin: From a Scandinavian language

cog

noun
     
Related topics: Technology, Mechanical
cog [countable]
1T a wheel with small bits sticking out around the edge that fit together with the bits of another wheel as they turn in a machine
2T one of the small bits that stick out on a cog
3

a cog in the machine/wheel

someone who only has a small unimportant job in a large organization

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