Final answer:
The symbol 'ss' with a squiggly line on top is called an eszett or ß and is used in the German language to represent the sound of 'ss'.
Step-by-step explanation:
Meaning of the symbol 'ss' with a squiggly line on top:
The symbol 'ss' with a squiggly line on top is called an eszett or ß. It is a letter used in the German language. The eszett represents the sound of 'ss' and is used in words where the letter 's' is repeated.
For example, in the word 'Straße' which means 'street' in German, the eszett is used instead of writing 'ss'. It is important to note that the eszett is only used in German and not in other languages.