| Answer | Crossword Clue |
|---|---|
| prefatorially | PREFATORIAL, serving as preface or opening remarks |
| prefatorial | serving as preface or opening remarks |
| vented | opening serving as an outlet, as for fluid or fumes |
| vents | opening serving as an outlet, as for fluid or fumes |
| vent | opening serving as an outlet, as for fluid or fumes |
| madreporitic | of or like madreporite, in echinoderms, a perforated plate serving as opening to the stone canal |
| sphincters | A ring of muscle surrounding and serving to guard or close an opening or tube, such as the anus or the openings of the stomach |
| sphincter | A ring of muscle surrounding and serving to guard or close an opening or tube, such as the anus or the openings of the stomach |
