Testnet, Testing Network
This definition comes from the technical glossary.
Definition
A global testing environment in which developers can obtain and spend satoshis that have no real-world value on a network that is very similar to the Bitcoin mainnet.
Synonyms
- Testnet
Not To Be Confused With
Links
- 
    Testnet mode — Developer Examples 
- 
    Testnet — Bitcoin Wiki 
- 
    Get testnet bitcoins — Testnet Faucet