Gin. Short word, but one that contains multitudes. When your average drinker thinks of gin, the libation he pictures is actually just one sort: London dry gin. Thanks to its centuries of popularity, piney, citrus-laced, floral London dry has commandeered the term "gin" as a shorthand for itself — despite the fact that it's just one of several styles of spirit that, through direct and tenuous connections alike, have come to be considered types of gin.
Do you know the other styles of gin? It goes pretty far beyond the bottles you're probably familiar with.