Considered one item at a time; -- contrasted with using general rules for groups of items considered by their class.(adjective)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "item-by-item" in a sentence
"Mr. Herkert said he expects "a vendor-by-vendor, and in some cases, item-by-item discussion of what does or does not get passed through" to consumers."
"I was going to go through your e-mail item-by-item, but I don't have the energy."
"Ocean Conservancy collects that data and publishes it every year in our Ocean Trash Index, the only item-by-item, location-by-location accounting of what's trashing our ocean."