Fly in the ointment and Rotogravure

Fly in the ointment noun - An inconvenience that detracts from the usefulness of something.

Rotogravure and fly in the ointment are semantically related. In some cases you can use "Rotogravure" instead a noun phrase "Fly in the ointment".

Rotogravure noun - Printing by transferring an image from a photogravure plate to a cylinder in a rotary press.

Fly in the ointment and rotogravure are semantically related. Sometimes you can use "Fly in the ointment" instead a noun "Rotogravure".