زيرنما،درونسو، )soffite(زير طاق ،سقف ،قسمت پايين عمارت معمارى : زيرطاق
the underside of a part of a building (such as an arch or overhang or beam etc.)(n)
Synonyms: soffit
Hypernyms: side
A soffit is an exterior or interior architectural feature, generally the horizontal, aloft underside of any construction element. Its archetypal form, sometimes incorporating or implying the projection of beams, rafters or trusses over the exterior of supporting walls, is the underside of eaves. The vertical band at the edge of the roof is called a fascia. A soffit of an arch is frequently called an intrados.