Top definition
An incredibly small machine. A manmade device that operates on the molecular level.
He swallowed the mechnanocal pill to protect his skin against the harmful rays of the Martian sun.
by Vincent Jenkins April 14, 2006
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug