grossarius

Medieval Latin grossarius derived from grossus, meaning thick or large — and in commercial use, bulk or wholesale. A grossarius bought and sold en gros: in large quantities, not by the individual item. The Worshipful Company of Grocers in London was originally the Guild of Pepperers — spice merchants who later combined with importers of bulk goods. Their trade was wholesale, not retail.

The Grocers' Company received its royal charter in 1428 and is the second-ranked of the Great Twelve livery companies of the City of London. In the medieval period, grocers traded in spices, dried fruits, sugar, and imported luxury foodstuffs — goods that came in bulk from the Mediterranean and East. The grocer was an importer and wholesaler, not a local shopkeeper.

The meaning narrowed over centuries. As retail grocery developed — small shops selling provisions in quantities appropriate for households — the grocer moved from the wholesale importer to the neighborhood shopkeeper. The 'corner shop' (corner grocery in American English) preserved the name while completely reversing the scale of operation: from bulk imports to individual portions.

Today 'grocery' and 'grocer' dominate everyday food retail vocabulary while almost no one knows their wholesale origin. A 'grocery list' is a list of items to buy in small quantities — the exact opposite of what a grossarius originally traded. The bulk dealer became the neighborhood shop, and kept the name.