#opening

• Antrostomy — A surgical procedure consisting of creating a permanent or temporary opening into a natural body cavity, particularly the maxillary sinus (antrum of Highmore), through the nasal wall, in order to ensure continuous drainage and effective ventilation of pathological secretions.
• Antrotomy — A surgical operation consisting of incising, opening, or bone perforation of an anatomical antrum (especially the mastoid antrum behind the ear or the maxillary sinus), performed to evacuate purulent collections and treat deep bone infections.
• Auftakt — A technical term of German origin used in musicology to designate the anacrusis or upbeat. In an extended and modern sense, frequently used in corporate, cultural, or journalistic jargon, it designates a launch event, an initial kick-off meeting, a prelude, or the official debut of a major project.
• Smoke evacuation hole — An opening in the roof or wall of a traditional peasant house (especially in Danubian or Dobrojean regions) serving as a rudimentary chimney for smoke evacuation or as a small window for attic ventilation. It can also designate the chimney structure itself.
• Smoke evacuation hole — A regional feminine variant of 'bageac'; a structural opening made in the roof or wall of a traditional peasant house, serving as a rudimentary chimney for smoke evacuation or as a small window for attic ventilation.
• Smoke hole — An isolated regional phonetic variant or historical transcription error for 'bageac'; an opening in the roof or a rudimentary chimney used for evacuating smoke from the hearth of traditional peasant houses.
• Smoke hole — An isolated regional phonetic variant of 'bageacă'; a structural opening made in the roof or wall of a traditional peasant house, serving as a rudimentary chimney for smoke evacuation or as a small window for attic ventilation.
• Smoke evacuation hole — A rare regional and archaic feminine variant (with the ancient '-auă' ending) for 'bageacă'; an opening in the roof or wall of a traditional peasant house serving as a rudimentary chimney for smoke evacuation or as an attic window.
• Smoke hole — An isolated regional phonetic variant or historical transcription error for 'bageac'; an opening in the roof or wall of a traditional peasant house serving as a rudimentary chimney for smoke evacuation or as a small window for attic ventilation.