Imperforate [adjective]

Although made and approved, this stamp is said to have been withheld from issue in this imperforate condition.

The 2nd or 1851 issue, as it is called in the circular, actually consisted of two series, the imperforate and perforate.

Attempts are, however, made to palm off trimmed reprints as imperforate specimens.

The reprinted three cents has the outer top and bottom lines of the original imperforate stamp.

Rhabdamminina, rab-da-mi-nī′na, n. a group of marine imperforate foraminiferous protozoans.

The stamp is nearly square, and the specimens possessed by our correspondent are imperforate.

On the early imperforate stamps we find a similar postmark in black, but lettered "Gambia" above and "Unpaid" below.

The inverse ratio of seven to one for a catalog value would make the perforated stamp list $42 with the imperforate at $6.

Yet the catalog value of the latter is $2.50 against 36 cents for the wove paper imperforate alone.

There are a good many specimens of these stamps imperforate, and they were on sale at a Canadian Post Office.