The word "mellaginous" is considered to be a rare and uncommon word. It is often used to describe something that is gelatinous, viscous or slimy in texture. However, if you need a synonym for this word, there are several options that you can use.
Some of the synonyms for "mellaginous" include ropy, glutinous, mucilaginous, gelatinous, adhesive, viscous, and thick. These words can aptly describe something that is thick and gooey in texture, and are commonly used in scientific or technical contexts.
In conclusion, if you're in need of a synonym for "mellaginous," there are several options available. Whether you choose "viscous," "glutinous," or "mucilaginous," each can accurately describe something that is slimy, sticky, or thick in texture.