subfenestral

The wall was clean, save for a patch of subfenestral graffiti.

1829, "Dr. George Shaw," in Personal and Literary Memorials, by Henry Digby Beste We even went down into the cellars, where was a vast vault filled with coal. "This puts to shame the subfenestral carbonaria of your alma mater." Every university-man knows how the coal-porter brings his sack on his shoulder, and empties the load into the hollowed-out window-seat; Forsan et haec olim meminisse juvabit.

Under the Window’s subfenestral world is full of openings as well as suggestive of the ground, the underground of life.

2002, "Archaeopterygidae", by Andrzej Elzanowski, in Mesozoic Birds, Luis M. Chiappe & Lawrence M. Witmer edd. The maxilla has a slender nasal process and a long subfenestral part. […] Wellnhofer (1974) and Witmer (1997) reconstructed a fenestrate "ascending ramus" of the maxilla, as found in nonavian theropods.