Støvfigur

Støvfigur
/ˈsd̥øwfiˌɡuːɐ̯/

n. (acoustics, building pathology)

1. A formation created when fine airborne particles accumulate along the nodal regions of standing waves or resonant fields.
2. A shadow-like particulate residue appearing on interior surfaces as a result of electrostatic attraction, thermal variation, or airborne dust circulation.

From Danish støv (“dust”) and figur (“form” or “figure)