imperforate

As the Chicago Tribune reported in 1940, stamp collectors saw Farley’s use of the imperforate sheets as a “betrayal” of the people who loved stamps most.

As the Smithsonian explains, this sheet of 1934 Yellowstone Park stamps is special because it’s “imperforate.”

In the middle of all this adjustment, my husband and I made time to research more about what an imperforate anus was, and what our next step would be for Rowen.

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

Imperforate, -d, im-pėr′fo-rāt, -ed, adj. not pierced through: having no opening.—adj.