She used the informal term for any friend of a father's generation.

Thus it remains in use as an informal term of convenience by some modern scientists.

Being an informal term, the "vodka belt" has no established definition.

This is a somewhat informal term that would have been used by young children to address their father.

Reality-based community is an informal term in the United States.

The name is an informal term for a clumsy person, particularly in sporting events when an athlete has dropped a ball.

Moonlet is an informal term for a particularly small natural satellite.

Both those gentlemen were on pleasant and rather informal terms with him.

These are mostly informal terms that are more common in casual speech.

In many areas, "village" is a term, sometimes informal, for a type of administrative division at the local government level.