antrum

Introduction

A natural chamber or cavity, including

• a dilation in the esophagus near the stomach (forestomach)
• a cavity in the epithelium that envelops the oocyte
• a cavity between the middle ear & temporal bone (tympanic antrum)
• initial portion of the gastric pyloris (pyloric antrum)
• maxillary antrum or maxillary sinus

More general terms

• anatomic structure

More specific terms

• maxillary sinus; maxillary antrum
• pyloric antrum; gastric antrum
• tympanic (mastoid) antrum