| air hole |
an opening for the intake or discharge of air or gas. [1/3 definitions] |
| anus |
in anatomy, the opening at the lower or rear end of the intestines, through which solid waste matter is excreted. |
| aperture |
a narrow opening, such as a hole, crack, gap, or slit. [2 definitions] |
| armhole |
an opening in a garment meant for the arm to pass through, as into a sleeve. |
| Ave Maria |
(Latin) Hail Mary; the opening words of a prayer to the Virgin Mary. [1/2 definitions] |
| balkline |
a line parallel and close to one end of a billiard table, from behind which the opening shot is made. |
| bell |
the flared opening of a musical brass or wind instrument, where the sound emerges. [1/4 definitions] |
| blaze2 |
to lead in making or opening, as a new pathway in knowledge. [1/4 definitions] |
| bloodletting |
the act or practice of purging by opening a vein; phlebotomy. [1/2 definitions] |
| bore1 |
to create (an opening such as a tunnel) by cutting through. [3/7 definitions] |
| boring1 |
the act or process of making a hole or other opening with a drill or similar tool. [2/3 definitions] |
| breach |
to make an opening or breach in; break through. [1/7 definitions] |
| can opener |
a hand-operated device used for opening cans, or an electrical device used for the same purpose. |
| cardia |
the opening from the esophagus into the stomach. |
| cardiac |
of or pertaining to the opening of the esophagus into the stomach. [1/3 definitions] |
| cave |
a natural hollow or series of hollows in the earth, esp. one with an opening in a hillside or cliff. [1/4 definitions] |
| cecum |
a cavity opening at only one end, esp. the pouch at the head of the large intestine. |
| cleft |
an opening made by or as if by splitting. [1/3 definitions] |
| clepsydra |
an ancient device that measured the passage of time by means of a regulated flow of water through an opening; water clock. |
| coaming |
a raised border around an opening in a roof, floor, or deck, designed to keep out water. |
| coelenterate |
any of numerous invertebrate animals that have tentacles around the oral opening and a single internal cavity for various bodily functions, such as the jellyfishes, anemones, and corals. |