Wiktionary
a. (label en British spelling) Not labelled; having no label. alt. (label en British spelling) Not labelled; having no label.
WordNet
Usage examples of "unlabelled".
The medical attache, in sum, feels tightly wound and badly underappreciated and is prepared in advance to be irritated by the item inside, which is merely a standard black entertainment cartridge, but is wholly unlabelled and not in any sort of colorful or informative or inviting cartridge-case, and has only another of these vapid U.
The medical attache, at their apartment, is still viewing the unlabelled cartridge, which he has rewound to the beginning several times and then configured for a recursive loop.
Attempts to trace the matrix of the samizdat without viewing it from induction on postal codes, e-micros-copĂes on the brown padded mailers, immolation and chromatography on the unlabelled cartridge-cases, extensive and maddening interviews of those civilians exposed place the likely dissemination-point someplace along the U.
So I took a graduated glass and kind of turned my back to her and picked out a bottle that looked all right, because a man that would keep poison setting around in a unlabelled bottle ought to be in jail, anyway.