The amount of liquid that a dipper (a cup-like utensil with a long handle) can hold when filled.
From dipper (an old English word for a cup-like utensil for dipping, from dip + -er meaning one that dips) + -ful (a suffix meaning the amount something can hold). An old-fashioned unit of measurement.
Before standardized measuring cups existed, recipes called for 'dipperfuls' of ingredients—the size varied depending on whose dipper you used, which is why old recipes sometimes turned out differently in different homes!
Complete word intelligence in one call. Free tier — 50 lookups/day.