Many years ago, my wife and I were having this very conversation, on the usages of a Dictionary vs a Thesaurus. At one point one of us exclaimed "we dont even own a thesaurus!"
The conversation moved on, till a minute or so later, one of our twin toddlers approached, holding up a toy dinasour.
"Mum! Dad! We *DO* have The 'Saurus!
... I guess you had to be there. :)
From that day on, that toy was referred to as "Thesaurus".

